Interesting Facts About Arsenic

Arsenic is best known as a poison and a pigment, but it has many other interesting properties. Here are 10 arsenic element facts: Arsenics symbol is As and its atomic number is 33. It is an example of a metalloid or semimetal, with properties of both metals and nonmetals. It is found in nature as a single stable isotope, arsenic-75. At least 33 radioisotopes have been synthesized. Its most common oxidation states are -3 or 3 in compounds. Arsenic also readily forms bonds with its own atoms.Arsenic occurs naturally in pure crystalline form and also in several minerals, usually with sulfur or metals. In its pure form, the element has three common allotropes: gray, yellow, and black. Yellow arsenic is a waxy solid that converts into gray arsenic after exposure to light at room temperature. Brittle gray arsenic is the most stable form of the element.The element name comes from the ancient  Persian word  Zarnikh, which means yellow orpiment. Orpiment is arsenic trisulfide, a mineral that resembles gold. The Greek word  arsenikos means potent.Arsenic was known to ancient man and important in alchemy. The pure e lement was officially isolated in 1250 by the German Catholic Dominican friar Albertus Magnus (1200–1280). Early on, arsenic compounds were used in bronze to increase its hardness, as colorful pigments, and in medicines.When arsenic is heated, it oxidizes and releases an odor similar to that of garlic. Striking various arsenic-containing minerals with a hammer might also release the characteristic odor.At ordinary pressure, arsenic, like carbon dioxide, does not melt but sublimes directly into vapor. Liquid arsenic only forms under high pressure.Arsenic has long been used as a poison, but its readily detected. Past exposure to arsenic may be assessed by examining hair. Urine or blood tests can assay recent exposure. The pure element and all its compounds are toxic. Arsenic damages multiple organs, including the skin, gastrointestinal tract, immune system, reproductive system, nervous system, and the excretory system. Inorganic arsenic compounds are considered more toxic than organic arsenic. While high doses can cause a quick death, low-dose exposure is also dangerous because arsenic can cause genetic damage and cancer. Arsenic causes epigenetic changes, which are heritable changes that occur without alteration of DNA.Although the element is toxic, arsenic is widely used. It is a semiconductor doping agent. It adds a blue color to pyrotechnic displays. The element is added to improve sphericity of lead shot. Arsenic compounds are still found in certain poisons, such as insecticides. The compounds are often used to treat wood to prevent degradation by termites, fungi, and mold. Arsenic is used to produce linoleum, infrared-transmitting glass, and as a depilatory (chemical hair remover). Arsenic is added to several alloys to improve their properties.Despite the toxicity, arsenic has several therapeutic uses. The element is an essential trace mineral for proper nutrition in chickens, goats, rodents, and possibly humans. It may be added to livestock food to help the animals put on weight. It has been used as a syphilis treatment, cancer treatment, and skin bleaching agent. Some species of bacteria can perform a version of photosynthesis that uses arsenic rather than oxygen to obtain energy.The element abundance of arsenic in the Earths crust is 1.8 parts per million by weight.  Approximately a third of the arsenic found in the atmosphere comes from natural sources, such as volcanoes, but most of the element comes from human activities, such as smelting, mining (especially copper mining), and release from coal-burning power plants. Deepwater wells are commonly contaminated with arsenic.

Applying The Standards. Melanie Hammonds. Grand Canyon

Applying the Standards Melanie Hammonds Grand Canyon University: SPE817 December 07, 2016 Applying the Standards Becoming a strong, influential leader is determined by an array of factors, as well as who we are as people. Our most inner being holds the key to whether or not we are destined to become successful leaders. Culture and society also play a powerful role in our leadership style. It is thought that various styles of leadership have varied effects on leadership practice and results. Regardless of our natural abilities, there will always be room for change, growth, and overall becoming a more effective leader. The leadership of the special education director is an essential role in the educational realm. Two of†¦show more content†¦Those are all qualifications and requirements that will never change throughout the years. Comparison of ISLLC and CEC Standards ISLLC standards are organized by knowledge, disposition and performances. The knowledge components are those areas of knowledge that are specific to the standards. The disposition is what the administrator believes in, values, and conveys their commitment to the respective standard. The performances are the processes that the administrator engages and ensures. Both standards address six essential areas to effective leadership, the CEC standards require a knowledge base that is much more specific to that required by special education administrators, while the ISLLC standards appear more generic. The Effectiveness of Leadership Style External factors, internal factors, and relationships all play a huge role in leadership. Society creates a stereotypical idea of what leadership should look like. Berger (2014) considered a conceptual framework that provides three major categories of major approaches to leadership, and how these approaches lead to a better clarification of leadership and its entities. These categories include: achievement, relationships, and values. The achievement category consists of 3 sub-categories (individual, behavioral, and contingent) that all focus on ways in which leaders are defined by their ability to achieve goals. They focus on a particular individual as aShow MoreRelatedStephen P. Robbins Timothy A. Judge (2011) Organizational Behaviour 15th Edition New Jersey: Prentice Hall393164 Words   |  1573 PagesGender Role Perceptions? 166 glOBalization! Chinese Time, North American Time 171 Myth or Science? Creative Decision Making Is a Right-Brain Activity 181 Self-Assessment Library Am I A Deliberate Decision Maker? 183 An Ethical Choice Whose Ethical Standards to Follow? 185 Self-Assessment Library How Creative Am I? 190 Point/Counterpoint Checklists Lead to Better Decisions 191 CONTENTS xi Questions for Review 192 Experiential Exercise Biases in Decision Making 193 Ethical Dilemma Do Unethical

Hamlet’s Soliloquys Free Essays

Throughout the play Hamlet there are soliloquys, these soliloquys enable the audience/reader to be able to know what the characters truly think and how they truly feel. Although many characters have their own soliloquys, Hamlet’s are the most informative and advance the plot the greatest. In Hamlet’s soliloquys we learn of events that speed his revenge, how he feels about his father’s death and his mother’s swift marriage to Hamlet’s uncle Claudius. We will write a custom essay sample on Hamlet’s Soliloquys or any similar topic only for you Order Now Hamlet’s first soliloquy of the play reveals possibly the most about his character in one soliloquy. This soliloquy reveals that Hamlet longs for death by saying â€Å"O that this too too solid flesh would melt† (Shakespeare 14) but he cannot kill himself because it is a sin: â€Å"His canon ‘gainst self-slaughter. † (Shakespeare 14). Hamlet is considering suicide because he finds life and the world utterly tedious and foul, and overrun with â€Å"things rank and gross in nature† (Shakespeare 14). When Hamlet talks about his father he compares him to the sun god Hyperion and his uncle and new king Claudius to a satyr. Hyperion to a satyr† (Shakespeare 14). Hamlet recalls how lovingly his father cared for his mother â€Å"so loving to my mother† (Shakespeare 14), and how passionately she loved him â€Å"she would hang on him As if increase of appetite had grown† (Shakespeare 14). When Hamlet thinks of his mother marrying his despised uncle, Hamlet is disgusted at how soon they were married after his father’s death. Hamlets first soliloquy creates a dark atmosphere because he longs for death and condemns his mother’s marriage to his father’s brother. By truthfully revealing his innermost thoughts and emotions, Hamlet’s soliloquy advances the plot by showing the audience and reader how Hamlet feels about the current situation, his father’s death, his own life and mortality, and his mother’s marriage to Claudius. Hamlet’s second soliloquy follows the visit from the late King Hamlet’s ghost. Once the ghost leaves, Hamlet seems fully determined on revenge in contrast to the underlying theme of meditation and love while Hamlet was with the ghost. Once the ghost is gone, Hamlet has no thoughts of whether or not the Ghost is good or evil. Hamlet vows to remember the Ghost and its command to revenge. He makes it clear his feelings toward his mother â€Å"O most pernicious women! † (Shakespeare 32), and to his uncle â€Å"O villain, villain, smiling damned villain! † (Shakespeare 32). This soliloquy’s main focus is on Hamlet’s revenge of his father’s death. Looking at this soliloquy it looks like Hamlet will be swift in his revenge, but his road to revenge will be full of procrastination and over thinking. This soliloquy advances the plot by showing what will be the focus throughout the rest of the play. In Hamlet’s third soliloquy he contemplates how the first player can weep for Hecuba, a fictional character, when in reality Hecuba means nothing to the first player and Hecuba cares nothing for him. Hamlet thinks of what the Player would do if he had the motive that Hamlet has. This thought provokes Hamlet to scold himself for apparent cowardice and lack of action when he has real reasons to take them. From this he curses Claudius â€Å"Bloody, bawdy villain! Remorseless, treacherous, lecherous, kindless villain! † (Shakespeare 62). Hamlet listens to himself and mocks his emotional outburst â€Å"Why, what an ass am I! † (Shakespeare 62). Hamlet realizes that he must act in some way and sets his brain to work and thinks of something to do â€Å"About, my brains. Hum† (Shakespeare 62). He begins to shape a plan to test the Ghost’s story. Hamlet starts to question whether the Ghost is a good or evil spirit â€Å"The spirit that I have seen May be a devil, and the devil hath power† (Shakespeare 62). Hamlet’s plan becomes clear, the players will perform a play showing a murder similar to the way that Claudius murdered the King Hamlet, if when watching this murder Claudius reveals his guilt; it will prove that the Ghost has spoken truly â€Å"The play’s the thing Wherein I’ll catch the conscience of the king. † (Shakespeare 63). This soliloquy creates a conniving atmosphere as Hamlet plans to make Claudius reveal his guilt of murdering his brother, King Hamlet. This advances the plot by showing that Hamlet is capable of taking some action and shows the audience Hamlet’s plan to make Claudius show his emotions. This fourth soliloquy starts out with possibly the most popular Shakespeare quote in the world â€Å"To be, or not to be, that is the question:† (Shakespeare 66). By this Hamlet could be talking about his own personal dilemma, whether he should live, or commit suicide. Hamlet could also not be considering his own situation, but is asking a more general question: is life worth living? This questions the advantages and disadvantages of human existence, whether it is better to be unhappy, than to be at all. This soliloquy creates a dark atmosphere because of Hamlet’s questioning of suicide and if life in general is worth living. This soliloquy shows that Hamlet is still questioning life as he did earlier in the play in his first soliloquy. Just before Hamlet’s fifth soliloquy, Hamlet argues with Polonius and refuses to be treated like a musical instrument that can be made to say anything at someone else’s wish. In the soliloquy Hamlet uses the melodramatic stock imagery of a traditional Elizabethan revenger, â€Å"Now could I drink hot blood,† (Shakespeare 88). As Hamlet leaves to meet Gertrude, he vows to scold her, but not harm her, â€Å"I will speak daggers to her, but use none. † (Shakespeare 88). In Hamlet’s sixth soliloquy, he enters into the church where he finds Claudius praying. Hamlet draws his sword to kill Claudius but then holds back because he is praying. If Hamlet were to kill him while he was praying then Claudius’s soul would be sent to heaven. Hamlet then reflects on the fact that his father was killed at a moment when he was unprepared for heaven thus condemning him to suffering after death. Hamlet then decides to kill Claudius at a more sinful moment, and thus damn him to hell. Once again Hamlet has found an excuse to postpone killing Claudius. There is dramatic irony in Claudius’s final couplet. It reveals that Hamlet may have caught the conscience of the king, but that he was deceived by appearance. Claudius only looked as if he was praying, his efforts to contact god were unsuccessful: â€Å"My words fly up, my thoughts remain below. Words without thoughts never to heaven go. † (Shakespeare 91). This soliloquy creates a dark atmosphere even though it is in a church because Hamlet wants to make sure that he not only kills Claudius but that he suffers eternally. This soliloquy shows that Hamlet is not a hard-hearted traditional revenger and continually finds reasons to delay killing Claudius. Before Hamlet’s seventh and final soliloquy, Hamlet speaks with a captain in the Norwegian army. The captain tells Hamlet that the army is passing through Denmark on its way to fight for a tiny unprofitable part of Poland. Hamlet reflects on the sickness of an apparently healthy society â€Å"This is th’impostume of much wealth and peace. † (Shakespeare 110) in which thousands will die in battle over such a â€Å"straw† (Shakespeare 110). These thoughts prompt Hamlet’s last soliloquy in which he once again reproaches himself for delaying the revenge of his father’s murder. Hamlet then considers that everything he encounters prompts him to take revenge: â€Å"How all occasions do inform against me, And spur my dull revenge. † (Shakespeare 110). He reflects that god has given him human intelligence to use and that capacity for making moral decision making is what separates humans from animals: â€Å"Sith I have cause, and will, and strength, and means To do’t† (Shakespeare 110). The encounter with Fortinbras’ army spurs Hamlet to speed his revenge: â€Å"Oh from this time forth, My thoughts be bloody or be nothing worth. (Shakespeare 111). Throughout Hamlet’s soilioquys we have been given an inside look at his deepest thoughts, his views on life and death, and his view on military expeditions. Most importantly we learn that Hamlet is not a traditional Shakespearean avenger. His main character flaws, procrastination and overthinking, prevent him from accomplishing a speedy revenge. How to cite Hamlet’s Soliloquys, Essay examples