Magnesium Facts (Mg or Atomic Number 12)

Magnesium is an element that is essential for human nutrition. This alkaline earth metal has atomic number 12 and element symbol Mg. The pure element is a silver-colored metal, but it tarnishes in air to give it a dull appearance. Crystals of pure magnesium metal. Lester V. Bergman / Getty Images Magnesium  Basic Facts Atomic Number: 12 Symbol: Mg Atomic Weight: 24.305 Discovery: Recognized as an element by Black 1775; Isolated by Sir Humphrey Davy 1808 (England). Magnesium first came into use as magnesium sulfate or Epsom salt. The story goes that in 1618 a farmer in Epsom, England could not get his cattle to drink from a well with bitter-tasting water, yet the water seemed to heal skin conditions. The substance in the water (magnesium sulfate) came to be known as Epsom salts. Electron Configuration: [Ne] 3s2 Word Origin: Magnesia, a district in Thessaly, Greece (Davy initially suggested the name magnium.) Properties: Magnesium has a melting point of 648.8 °C, boiling point of 1090 °C, specific gravity of 1.738 (20 °C), and valence of 2. Magnesium metal is light (one-third lighter than aluminum), silvery-white, and relatively tough. The metal tarnishes slightly in air. Finely divided magnesium ignites upon heating in air, burning with a bright white flame. Uses: Magnesium is used in pyrotechnic and incendiary devices. It is alloyed with other metals to make them lighter and more easily welded, with applications in the aerospace industry. Magnesium is added to many propellents. It is used as a reducing agent in the preparation of uranium and other metals that are purified from their salts. Magnesite is used in refactories. Magnesium hydroxide (milk of magnesia), sulfate (Epsom salts), chloride, and citrate are used in medicine. Organic magnesium compounds have many uses. Magnesium is essential for plant and animal nutrition. Chlorophyll is a magnesium-centered porphyrin. Biological Role: All known living cells require magnesium for nucleic acid chemistry. In humans, over 300 enzymes use magnesium as a catalyst. Foods rich in magnesium include nuts, cereals, cocoa beans, green leafy vegetables, and some spices. The average adult human body contains 22 to 26 grams of magnesium, mostly in the skeleton and skeletal muscles. Magnesium deficiency (hypomagnesemia) is common and occurs in 2.5 to 15% of the population. Causes include low calcium consumption, antacid therapy, and loss from the kidneys or gastrointestinal tract. Chronic magnesium deficiency is associated with hypertension, type 2 diabetes, and metabolic syndrom. Sources: Magnesium is the 8th most abundant element in the earths crust. While it is not found free it nature, it is available in minerals including magnesite and dolomite. The metal may be obtained by electrolysis of fused magnesium chloride derived from brines and seawater. Atomic Weight: 24.305 Element Classification: Alkaline Earth Metal Isotopes: Magnesium has 21 known isotopes ranging from Mg-20 to Mg-40. Magnesium has 3 stable isotopes: Mg-24, Mg-25 and Mg-26. Magnesium Physical Data Density (g/cc): 1.738 Appearance: lightweight, malleable, silvery-white metal Atomic Radius (pm): 160 Atomic Volume (cc/mol): 14.0 Covalent Radius (pm): 136 Ionic Radius: 66 (2e) Specific Heat (20 °C J/g mol): 1.025 Fusion Heat (kJ/mol): 9.20 Evaporation Heat (kJ/mol): 131.8 Debye Temperature (K): 318.00 Pauling Negativity Number: 1.31 First Ionizing Energy (kJ/mol): 737.3 Oxidation States: 2 Lattice Structure: Hexagonal Lattice Constant (Ã…): 3.210 Lattice C/A Ratio: 1.624 CAS Registry Number: 7439-95-4 Magnesium Trivia: Magnesium was originally named magnium by Humphrey Davy after isolating the element from magnesia, known now as magnesium oxide.The 1915 Nobel Prize in Chemistry was awarded to Richard Willstà ¤tter for his work with the chlorophyll and identifying magnesium was the central atom in its structure.Epsom salt is a magnesium compound, magnesium sulfate (MgSO4).Magnesium is the 10th most abundant element in the human body.Magnesium will burn in pure nitrogen gas and pure carbon dioxide gas.Magnesium is the fifth most common element found in seawater. Sources Emsley, John (2011).  Natures building blocks: An A-Z Guide to the Elements. Oxford University Press. ISBN 978-0-19-960563-7.Greenwood, Norman N.; Earnshaw, Alan (1997).  Chemistry of the Elements  (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.Hammond, C. R. (2004). The Elements, in  Handbook of Chemistry and Physics  (81st ed.). CRC press. ISBN 978-0-8493-0485-9.Rumble, John R., ed. (2018). CRC Handbook of Chemistry and Physics (99th ed.). Boca Raton, FL: CRC Press. ISBN 978-1-1385-6163-2.Weast, Robert (1984).  CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. ISBN 0-8493-0464-4. Return to the Periodic Table

The Female, Bildungsroman, By Carol Lazzaro Weis - 1083 Words

Vanessa Bethea 355:201 Flynn 24 March 2016 Literature Review #4 Article: Lazzaro-Weis, Carol. â€Å"The Female Bildungsroman: Calling It into Question†. NWSA Journal 2.1 (1990): 16–34. Web. Author: Carol Lazzaro-Weis is the President of the American Association of Italian Studies, the largest associate of university professors of Italian in North America and serves on several editorial boards. Professor Lazzaro-Weis has been appointed to serve on the International Advisory Board for The Centre of Contemporary Women’s Writing. Her teaching and research interests include nineteenth and twentieth century Italian literature, genre, French women writers of the seventeenth and eighteenth century, feminist theory, etc. In addition to numerous articles on French and Italian writers, she has published the following books: From Margins to Mainstream: Feminism and Fictional modes in Italian Women’s Writing, La Signorina and Other Stories, Confused Epiphanies: L’abbà © Prà ©vost and the Romance Tradition, etc. She is currently preparing a book-length manuscript on women’s historical novels in Italy, France, Francophone Canada and the Caribbean. (Carol Lazzaro-Weis - Department of Romance Language Literatures - University of Missouri. Carol Lazzaro-Weis - Department of Romance Language Literatures - University of Missouri. N.p., n.d. Web.) Brief Summary: The Female â€Å"Bildungsroman†: Calling It into Question by Carol Lazzaro-Weis discusses the term bildungsroman as it relates to female

Rhetorical Analysis of Jfk Inaugural Speech free essay sample

In early 1961, the United States of America was enduring racial tensions and inequalities on the home-front, as well as waging war against Communism and the Cold War internationally. Chaos and fear had penetrated the minds of the American people because the Cold War was near its pinnacle; the American people longed for a strong, reassuring leader. John F. Kennedy provided that reassurance in his Inaugural Address. Taking the current national and international turmoil into account, Kennedy sought to persuade the Nations people to Join in his efforts and unify together in order to achieve peace. The inaugural address is saturated with rhetorical strategies seeking to flatter the American People and utilizes words of encouragement to evoke unification. Kennedy was able to effectively establish a profound kairotic moment at which his discourse can make the most difference or have the most influence. The speech persuades the American people by providing motivating propositions through appeals to ethos, logos and pathos. We will write a custom essay sample on Rhetorical Analysis of Jfk Inaugural Speech or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Kennedys inaugural address plays to an irrefutably persuading rhythm. Strong, motivational verbs are Joined with sophisticated adjectives in a manner that would make the most nane speech capable of swaying an entire population. In order to capture the minds of the American people, Kennedy begins with an antithesis, calling his victory, a celebration of freedom-symbolizing an end, as well as a beginning. This statement is to ensure the people that they are embarking in a new era of reform and peace, the end of turmoil, and the beginning of prosperous tranquility. Similar to the Declaration of Independence, Kennedys speech emphasizes the unification of the country through the use of parallelism and Juxtaposition. Kennedy appeals to his udiences ethos through visions of freedom and American values. He does this through the Juxtaposition of freedom from the tyranny of man and the reliance of God to provide such freedom. By utilizing a quote from Isaiah, .. to undo heavy burdens and let the oppressed go free, Kennedy persuades all who listen to pursue freedom because it is both their God given right and their patriotic duty. Kennedy emphasizes his argument for patriotic unification by effectively using anaphora to break his pledges and propositions into segments. The repetition of declarative lements exemplifies his pledge that he will continue to pursue peace and encourage action. He declares, to those new states whom we welcome to the ranks of the free, and, to those peoples in huts and villages across the globe in order to evokes nationalistic feelings through the appeal to pathos. This pledge of calm persuasiveness exemplifies his stasis of remaining strong and unified amongst the division of tyranny. Kennedys choice of such language caused his audience to find it hard to disagree with such an amiable stance. He stated, United, there is little e cannot do in a host of co-operative ventures. Divided, there is little we can do, for we dare not meet a powerful challenge at odds and split asunder. This statement exemplifies the importance of international and national unification. Due to the Cold War, Kennedy is extremely intent on bringing liberty to the world much more than protecting the liberties already present. However, it is evident that there was an underlying fear in his pledge; almost a plea to advisories for union and non violent where disagreeing with him would seem unpatriotic and weak, In your hands, my ellow citizens, more than mine, will rest the final success or failure of our course. Since this country was founded, each generation of Americans has been summoned to give testimony to its national loyalty. The graves of young Americans who answered the call to service surround the globe. Kennedy chose words such as, national loyalty, in order to evoke an appeal to ethos and logos and graves of young Americans to appeal to their pathos. He points to the resiliency of the United States and the need for the people to continue to support the ideals of freedom that ave seemed forgotten. The people were challenged to Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe, to assure the survival and the success of liberty. Kennedy successfully appeals to the pathos and ethos of the audience in order to establish his views of the inane strength and duty within all Americans. In the conclusion of his speech, Kennedy cleverly positions one of the most memorable quotes of history. While the audience is full of excitement and atriotic duty because of his previous statement calling for strength and faith, he pauses for a moment and states And so, my fellow Americans, ask not what you r country can do for you; ask what you can do for your country. This statement attenuates itself to the rhetorical instrument of kairos because the placement and the time in which Kennedy chose to speak the words provided its long lasting impact. The influence of this statement has persuading many Americans to act upon their own stasis and exemplify true freedom and strength for their country.

Othellos Character During The Play Is First Shown As A Hero Of War And

Othello's character during the play is first shown as a hero of war and a man of great pride and courage. The other main characters in the play all form their own opinions of him and as the play continues, his character begins to deteriorate and become less noble. Chronologically through the play Othello's character changes from a flawless military leader, to become a murderer. Also as the play progresses, the other characters in the play change their opinions of Othello which causes the plot to happen the way it did. Throughout the first act of the play, Othello was shown as many different characters depending on who was speaking. Iago complains of Othello's pride and "bombast circumstance" and is angered by the appointment of Cassio, and educated military theoretician of Florence to lieutenant, instead of himself. Although he knows Othello is a proud man, his open and trusting nature in the beginning of the play will be eroded by the conclusion of the plot. As Iago is speaking to Brabantio about Othello, he uses the term "white ewe" to represent Desdemona, and "black ram" when referring to Othello. By using these terms, it shows that he is trying to give a bad impression of Othello when he is speaking to the royal family in Venice, because Othello is a Moor or a Negro. Iago shows his black hatred for the Moor, and his jealousy of Cassio in his first soliloquy and also reveals his evil intentions. As the act continues and Othello is being searched for by a group of people, Iago attempts to incite Othello into anger against Brabantio, but Othello does not take the bait. He feels that he (Brabantio) may do his worst because Othello is assured that his military services to the government will outweigh Brabantio's complaints of him marrying Desdemona. These answers to Iago's persistence show that he is still a character of calmness and dignity, and he still has the self-assurance suitable to command armies of men. When Othello is found by Cassio, he seems to be relieved because he does not like personal conflict, which would have occurred if Brabantio had found him instead. After he is found, Othello is taken to Brabantio where he is interrogated on how he possessed Desdemona enough in order to make her run off with him. Brabantio damns Othello and calls him an enchanter, saying that the "tender, fair, and happy" Desdemona was too shy of marriage, which is why she shunned all of the suitors sent to her. This entire scene helps to establish Othello as an alert and composed leader. Later in this act, Othello offers to explain how he won Desdemona. He chooses not to contradict or deny that he has used "magic" but when the true meaning of the "magic" comes to light it is shown that he used the magic of love and not a conjured magic. Iago also suspects Othello of having some kind of relationship with his own wife, although he doesn't know or even seem to care whether or not his suspicions have any foundation at all. Again, according to Iago, Othello is an "ass" because he has a "free and open nature." This act works as an introduction to the Othello character and shows how other characters react to his presence in different ways. The remaining acts of the play continue to show how the characters react to Othello's lifestyle changes. Even though he must rid Cassio of his lieutenant responsibilities forever, Othello explains how he still loves him. If it were up to him Othello would have reinstated Cassio at the first opportunity, but this would be bad political practice. He wishes to appease Desdemona by doing this but he realizes that he can't. These practices show that he is a good governor and does not wish to arouse hostilities in the city, with an untimely pardon of Cassio. Desdemona tells Emilia that Othello is not the jealous type, which Othello believes to be true himself. However, as the play progresses through Act 3, Othello talks to Iago telling him that their prior conversation gave him reason to suspect Desdemona's motives. As a reader, you can see that Othello's capacity

The Klu-Klux-Klan During Recon essays

The Klu-Klux-Klan During Recon essays The Ku Klux Klan During Reconstruction The Ku Klux Klan and other intimidators like the Louisiana Knights of the White Camellia, spread rapidly throughout the south as an answer to radical reconstruction. Nathan Bedford Forest formed the Ku-Klux-Klan in Tennessee during 1866. Forest, a former Confederate general and slave trader, was the Ku-Klux-Klans first Imperial Wizard. This essay will weigh the evidence supported by the traditional view, that is, the Ku Klux Klan was an organization of white Southerners who resisted the horrors of reconstruction and halted the northern encroachment. This traditional view can also be dubbed the, white is right or racist view. The other popular view is called the revisionist view and it deems the Ku Klux Klan a violent and disrespectful organization set on overthrowing rule by negros, scalawags, and carpetbaggers. This essay will look at the horrific acts committed by the Klan during the period of radical reconstruction, question the morality of such acts, and conclude that it is indubitable that the Ku Klux Klan was in fact a terrorist organization which hindered social and political integration: that if these evil men had let congress win the new south would have been a better place. In 1866 congress was battling with President Johnson over reconstruction policy and congress was winning. The 10 per cent policy and admittance of state governments comprised of former confederates made some think the war was fought in vain. The Black Codes, laws enacted to repress the black man, had been struck down by the Radical Republicans. The radicals believed they should not accept the enemy back as prodigal sons. The passing of the fourteenth amendment as a stipulation of re-admission to the Union and the erecting of barbarous black governments; many southern whites hung up their gray uniforms and put on white hooded cloaks. The Ku Klux Klan was forme...

The Function of the Federal Reserve System in the US Economy

The Function of the Federal Reserve System in the US Economy When countries issue currency, especially fiat currency that is not specifically backed by any commodity, it is necessary to have a central bank whose job it is to monitor and regulate the supply, distribution, and transacting of currency. In the United States, the central bank is called the Federal Reserve. The Federal Reserve currently consists of the Federal Reserve Board in Washington, D.C., and twelve regional Federal Reserve banks located in Atlanta, Boston, Chicago, Cleveland, Dallas, Kansas City, Minneapolis, New York, Philadelphia, Richmond, San Francisco, and St. Louis. Created in 1913, the history of the Federal Reserve represents the federal government’s   ongoing effort to achieve the goals of any central banking system - ensure a secure American financial system by maintaining a stable currency backed by the benefits of high employment and minimal inflation.   Brief History of the Federal Reserve System The Federal Reserve was created on December 23, 1913, with the enactment of the Federal Reserve Act. In crafting the landmark legislation, Congress was responding to a series of economic panics, bank failures, and credit scarcity that had plagued the nation for decades. When President Woodrow Wilson signed the Federal Reserve Act into law on December 23, 1913, it stood as a classic example of an all-too-rare politically bipartisan compromise balancing the need for a consistently regulated centralized national banking system with the competing interests of established private banks backed by a strong â€Å"will of the people† populist sentiment. Over the more than 100 years since its creation, responding to economic disasters, such as the Great Depression in the 1930s and the Great Recession during the 2000s, have required the Federal Reserve to expand its roles and responsibilities. The Federal Reserve and the Great Depression As U.S. Representative Carter Glass had warned, years of speculative investments led to the disastrous â€Å"Black Thursday† stock market crash of October 29, 1929. By 1933, the resulting Great Depression had resulted in the failure of nearly 10,000 banks, leading newly inaugurated President Franklin D. Roosevelt to declare a banking holiday. Many people blamed the crash on the Federal Reserve’s failure to stop the speculative lending practices quickly enough and for its lack of an in-depth understanding of monetary economics necessary to implement regulations that might have lessened the devastating poverty resulting from the Great Depression.  Ã‚   In response to the Great Depression, Congress passed the Banking Act of 1933, better known as the Glass-Steagall Act. The Act separated commercial from investment banking and required collateral in the form of government securities for Federal Reserve notes. In addition, Glass-Steagall required the Federal Reserve to examine and certify all banking and financial holding companies. In a final financial reform, President Roosevelt effectively ended the long-standing practice of backing U.S. currency by physical precious metals by recalling all gold and paper silver certificates, effectively ending the gold standard. Over the years since the Great Depression, the duties of the Federal Reserve expanded significantly. Today, its responsibilities include supervising and regulating banks, maintaining the stability of the financial system and providing financial services to depository institutions, the U.S. government, and foreign official institutions. How Does the Federal Reserve System Work? The Federal Reserve system is overseen by a seven-member board of governors, with one member of this committee chosen as the chairman (commonly known as the Chairman of the Fed). The president of the United States is responsible for appointing Fed chairmen to four-year terms (with confirmation from the Senate), and the current Fed chair is Janet Yellen. (The regular members of the board of governors serve fourteen-year terms.) The presidents of the regional banks are appointed by each individual branchs board of directors. The Federal Reserve system serves a number of functions, which generally fall into a couple of categories: first, it is the Feds job to ensure that the banking system stays responsible and solvent. While this does sometimes mean that the Fed has to work with the three branches of government to think about explicit legislation and regulation, it more often means that the Fed works in a transactional sense to clear checks and to act as a lender to banks that want to borrow money themselves. (The Fed does this mainly to keep the system stable and is referred to as the lender of last resort, since the process is not really encouraged.) The other function of the Federal Reserve system is to control the money supply. The Federal Reserve can control the amount of money (highly liquid assets such as currency and checking deposits) in a number of ways. The most common way is to increase and decrease the amount of money in the economy via open-market operations. Open-Market Operations Open-market operations simply refer to the process of the Federal Reserve buying and selling U.S. government bonds. When the Federal Reserve wants to increase the money supply, it simply purchases government bonds from the public. This works to increase the money supply because, as the buyer of the bonds, the Federal Reserve is giving out dollars to the public. The Federal Reserve also keeps government bonds in its portfolio and sells them when it wants to decrease the money supply. Selling decreases the money supply because the buyers of the bonds give currency to the Federal Reserve, which takes that cash out of the hands of the public. There are two important things to note about open-market operations: first, the Fed itself isnt directly responsible for printing money. Printing money is handled by the Treasury, and there are multiple channels by which the money gets into circulation. (Sometimes, for example, the new money just replaces worn-out currency.) Second, the Federal Reserve doesnt actually create or issue the government bonds, it just handles them in secondary markets. (Technically, open-market operations could be conducted with a number of different assets, but it makes sense for the government to manipulate the supply and demand of an asset that was issued by the government itself.) Other Monetary Policy Tools Although not used nearly as frequently as open-market operations, there are other tools that the Federal Reserve can use to change the amount of money in the economy. One option is to change the reserve requirement for banks. Banks create money in an economy when they loan out customers deposits (since both the deposit and the loan count as money), and the reserve requirement is the percentage of deposits that banks have to keep on hand rather than lending out. An increase in the reserve requirement, therefore, restricts the amount that banks can lend out and thus reduces the money supply. Conversely, a decrease in the reserve requirement increases the number of loans that banks can make and increases the money supply. (This, of course, assumes that banks want to lend more when they are allowed to do so.) The Federal Reserve can also change the money supply by changing the interest rate that it charges banks when it acts as the lender of last resort. The process by which banks borrow from the Federal Reserve is called the discount window, and the interest rate that the Federal Reserve charges is called the discount rate. When the discount rate is increased, it is more expensive for banks to borrow in order to cover their reserve requirements. Therefore, a higher discount rate causes banks to be more careful about reserves and make fewer loans, which reduces the money supply. On the other hand, lowering the discount rate makes it cheaper for banks to rely on borrowing from the Federal Reserve and increases the number of loans they are willing to make, thus increasing the money supply. Decisions regarding monetary policy are handled by the Federal Open Market Committee, which meets approximately every six weeks in Washington in order to discuss changing the money supply and other economic issues. Updated by Robert Longley

Cash Flow Statement Coursework Example | Topics and Well Written Essays - 750 words

Cash Flow Statement - Coursework Example On the other hand, UKFI has adopted debtors’ management approach by adopting a credit policy that is attractive to its customers. In the year 2011, UKFI registered an increase in its trade receivables of 193,000 pounds and in 2012 a decrease of 66,000 pounds indicating that it was able to receive more funds from its debtors. On the trade payables, there was an increase of 175,000 pounds indicated that it paid less of its debts. RBS has registered a steady increase in its receivables over the two years implying that its debtors have been prompt in paying their debts. However it has registered a decrease in its payables meaning that it has increased that amount owed to its creditors. This is considered to be more risky to the firm due to its inability to maintain a low creditor’s ratio. Both firms have also adopted short term financing methods such as factoring in addition to the already existing methods to ensure that the firm does not fail to meet its short term financial obligations by relying solely on the internally generated funds. The short term financing methods allows the firms to minimize debts by transferring the risk to other firms (Plewa, 1995, 011). Both firms have been able to meet their loan payments with UKFI being the leading in the amount that it pays each year and this indicates a more prudent approach on their part. RBS has relied heavily on issue of its ordinary shares to finance its projects for the years. However in 2012, it mainly raised funds from the issue of its subordinated liabilities as well as proceeds from non-controlling interests issued. Non-controlling interest refers to that portion of a subsidiary corporations stock that is not owned by the parent corporation. It allows the firm to make its financial decision without having to consult the holders of the non-controlling interests making its holding more advantageous for the