Strontium- is named after Strontian a small town in Scotland Atomic number- 38 Symbol- Sr Mass- 87.62 Density- 2.63 g/cm3 Melting point- 7770C Boiling point- 13820C State at room temp- In room temperature strontium is an alkaline earth metal. Alkaline earth metals are silvery‚ shiny and relatively soft metals‚ they are fairly reactive and they all occur in nature‚ but are only found in Compounds and minerals‚ not in their elemental forms. Solid strength- in a room temperature environment strontium
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Atomic Theory-Study Sheet-Updated 9/15 *Reminder-Review Notes and this Question/Answer sheet DAILY to prepare for your next test. Goal: Grade of “A”. *Flash Review….Test October 7th How to use this study guide-Print the page and fold between questions and answers OR cover the answer column. Ask yourself the questions and see if you can correctly answer. Use it until you can answer ALL questions quickly with 100% accuracy. Do a little every day‚ and you will be ready for the next test
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1. Electron is a negatively charged particle present in an ----------. (a) Atom (b) Proton (c) Neutron (d) None of the above 2. The formula 2n2 determines the____________ that can be accommodated in any level. (a) Electrons (b) Atoms (c) Neutrons (c) Protons 3. __________ are used to get a strong magnetic field. (a) Superconductors (b) Semiconductors (c) Magnetic field (d) None of the above 4. -----------------are used in heating elements‚ precision instruments‚ incandescent lamps‚ and motor
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Neon By: Ariana Neon was discovered by Morris Traver‚ and William Ramsay in 1898. Neon is a gas that produces a colored glow when excited by electricity passing through a glass tube in which the glass is confined. But you may wonder how are these neon lights even made? Well‚ the Neons gas is inserted into glass tubing using a thin pipe then the pipe is quickly removed‚ and the glass is fused at the end. The neon tube produces the light when an electrical current bombards the gas atoms with electrons
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on the testing of nuclear weapons . The Limited Test Ban Treaty of 1963‚ which has been signed by more than 120 nations prohibits nuclear explosions in the atmosphere ‚oceans and the space‚ allowing only them underground .The Thresh hold Test Ban Treaty of 1976‚ a bilateral agreement between the US and the USSR‚ prohibits underground tests of nuclear weapons with a yield greater than 150 kilotons. In the present climate of widespread pressure for more effective control of nuclear arms the idea of
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Nuclear Plants The question of whether the U.S. should have nuclear power plants is very controversial. There are two sides that one can take; however‚ both sides have their own share of problems. If you chose to not have nuclear plants‚ then eventually all natural resources will run out. The oil supply will run out relatively soon‚ and all other sources will run out too. The natural resources that we have now are still harmful to the earth however. The gas which we use for our cars pollutes
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time I hear a word "War" as a child‚ I still have to hear a word "Nuclear Weapons". From that time‚ I didn’t know what they are. But when I grow up‚ I learned that Nuclear Weapons are the device that can destroy many people or one small country. So I believe that They are the killing device. From these reasons First‚ Nuclear Weapons have strong mass destruction. For example‚ The United States sent "Little boy"‚ a uranium gun-type fission bomb to Hiroshima‚ Japan. 3 days Later‚ The United States sent
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“Iran nuclear program can only be stopped by military means.” To what extent do you agree with this statement? In November 2011 the International Atomic Energy Agency reported that it had “serious concerns regarding possible military dimensions to Iran’s nuclear program”. Iran’s Central Bank was sanctioned and the European Union has imposed an embargo on Iranian oil. Right after Iranian President Mr. Mahmoud Ahmadinejad announced that he will close the Strait of Hormuz if EU persists on its
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I agree with the nuclear optimists that nuclear proliferation will make international politics more stable and less war prone. Since nuclear weapons are classified as weapons of mass destruction (WMDs)‚ more specifically as true WMD (Baylis pg 386)‚ I believe states that possess nuclear weapons will be reluctant to use them against states who also possess nuclear weapons‚ out of the fear those state will retaliate with their own nuclear weapons. The use of nuclear weapons poses risk to a state that
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Accounting Approach to Nuclear.” Triple Pundit: People‚ Planet‚ Profit. 5 Apr 2011. 6 Aug 2011. In his article‚ “A True Cost Accounting Approach to Nuclear‚” Robert Costanza first presents the example of hidden clean up costs of the nuclear disaster in the Fukushima Daiichi power plant in Japan. The cost of which are paid in large part by the national government and taxpayers rather than the industry. Costanza explains that this makes judging the value of nuclear power difficult
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