The University of the West Indies (Mona) Department of Chemistry Preliminary Chemistry A (Chem 0901) Atomic Structure: Tutorial 2 For discussion in the week beginning September 24‚ 2012. Answers should be submitted by 9:00 am on Monday September 24‚ 2012 in the box provided. Please write your ID number and Laboratory day clearly on your script. 1. Give an expression for the Balmer-Rydberg equation in terms of wavelength λ‚ the Rydberg constant R‚ and the integers m and n where m < n.
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Time Bomb In the United States about every other marriage ends in divorce these days. The reasons are varied‚ but what matters more are those directly affected‚ the children. Fifty percent will witness their parents’ divorce before they are adults and one of ten of those children will see it a second or even third time. We know the nature of divorce can be an ugly mess for everyone involved‚ but who speaks for the little guy? Most times adults will control the situation whether it is moving to
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The Atomic Bombing of Hiroshima (Then public Explanation 1945) Harry Truman became a president of the United States on April 12th on 1945 upon the death of FDR. Before 1942 United States started to develop their nuclear weapons can make them powerful form other counties. The U.S. spent at least $8.52 trillion in present day terms on nuclear weapons development Between 1940 and 1996‚ And United States is the only country to have used them in warfare with the twice bombings of Hiroshima and Nagasaki
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Atomic War or Peace? Was the dropping of the atomic bomb on Japan justified? Many people believe that it was very justified‚ but was it? Some reasons could have been the attack on Pearl Harbor‚ the destruction of Japans power to make war‚ also what seemed to the only answer to end war. “I wouldn’t hesitate if I had the choice. I’d wipe ‘em out. You’re gonna kill millions of innocent people‚ but at the same time we’ve never fought a war anywhere in the world where they haven’t fought and killed
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Year 8 geography- global organization. Part A Organization 1 amnesty international a) what is Amnesty international Amnesty international is a democratic organization which is not funded by the government or other political party that complains to the government or other organizations for abusing human rights or falling to protect people. Plus amnesty international defends human rights for people whenever there are violated. b) what does amnesty international do The things that amnesty international
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1.1 The atoms‚ during bond formation‚ may lose or gain electrons (valence electrons) in order to achieve a stable state‚ or technically speaking‚ a stable electron configuration. Usually metal atoms lose electrons and non-metals gain electrons in order to achieve electron stability. When dealing with bond formation (Ionic bonding for example) we need to analyse the outer shell of the atom. Metals usually present 1‚ 2 or 3 electrons in their outer shell therefore they have to give them away to achieve
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ATOMIC PHYSICS The nuclear atom All matter is made up of atoms which consist of a central nucleus‚ surrounded by electrons. Inside the nucleus are protons and neutrons. Particle Relative mass Charge Location Proton 1840 + Nucleus Neutron 1840 0 Nucleus Electron 1 - Outside nucleus Proton or atomic number (Z) This is the total number of protons in the nucleus of an atom. Nucleon or mass number (A) This is the total number of protons and neutrons in the nucleus of an atom. Note: a nucleon
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‘Atomic Diplomacy’: At Potsdam the President had seemed in a conciliatory mood toward the interests of the Soviet Union‚ traditional Russian concerns like those for an ‘ice free’ port were treated with an earnestness they didn’t deserve‚ and when it came to any serious measures like the fixing of borders post war‚ the American President would note that such important matters should rightly be postponed until the meeting of the “full peace conference” expected to take place sometime in the fall
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In August of 1945 nuclear weapons were exploded upon the people of Hiroshima and Nagasaki in Japan. Following these atomic bombings‚ Japan surrendered. But were the atomic bombings necessary to save Allied lives and end Japan’s threat to world peace while avoiding a deadly invasion of the Japanese mainland? The following account summarizes the events that led to Japan’s surrender in World War II and then considers other means of achieving Japan’s surrender. The second half of this article‚ which
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1. a) Democritus reasoned that if matter could be infinitely divided‚ it was also subject to complete disintegration from which it can never be put back together. However‚ matter can be reintegrated. b) In Greek‚ the prefix "a" means "not" and the word "tomos" means cut. Our word atom therefore comes from atomos‚ a Greek word meaning uncuttable. All matter is composed of atoms‚ which are bits of matter too small to be seen. These atoms CANNOT be further split into smaller portions. 2. At
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