Chemistry 2202 Review Final Exam Chapter 2: The Mole 1. Isotope – atoms of an element that have the same number of protons but different numbers of neutrons. Ex. The three forms of oxygen are called oxygen-16‚ oxygen-17‚ and oxygen-18. They all have 8 electrons and are written as 16/8 O (8 protons + 8 neutrons)‚ 17/8 O (8 protons + 9 neutrons)‚ and 18/8 O (8 protons + 10 neutrons). 2. 3. Mass Number – the sum of the protons and neutrons in the nucleus of one atom of a particular
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term trace element‚ the modifier trace means Answer - a - the element is required in very small amounts. 3) Compared to 31P‚ the radioactive isotope 32P has Answer - b - one more neutron 4) Atoms can be represented by simply listing the number of protons‚ neutrons‚ and electrons - for example‚ 2P+; 2n0; 2e- for helium. Which atom represents the 18O isotope of oxygen? Answer - b - 8p+; 10n0; 8e- 5) The atomic umber of sulfur is 16. Sulfur combines with hydrogen sulfide. Based on the electron configuration
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Chemistry Equipment Symbols 1. Test Tube 2. Boiling Tube 3. Beaker 4. Conical Flask 5. Test Tube Holder/ Tongs /Clamp Stand 6. Measuring/Graduating 7. Funnel 8. Pipette Cylinder 9. Spatula 10. Tripod 11. Bunsen Burner 12. Glass Bulb 13. Burette 16. Condenser Pipette Changes of State Filtering Solutions 03-Nov
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Atomic Number: 34 Atomic Radius: 117 pm Atomic Symbol: Se Melting Point: 220.5 C Atomic Weight: 78.96 Boiling Point: 685 C Electron Configuration: [Ar]4s23d104p4 Oxidation States: 6‚ 4‚ -2 Selenium is a non metallic chemical element‚ member of the group XVI of the periodic table. In chemical activity and physical properties it resembles sulfur and tellurium. Selenium appears in a number of allotropic forms: the most popular are red amorphous powder‚ a red crystalline material‚ and a
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Nutrients…………………………………………………………………………...5 III. Different kind of pollutants………………………………………………………………6 a. Organic pollutants…………………………………………………………………6 b. Inorganic pollutants……………………………………………………………..6 c. Metals……………………………………………………………………………6 d. Radioactive Isotopes………………………………………………………………7 1. Alpha………………………………………………………………….7 2. Beta……………………………………………………………………7 3. Gamma………………………………………………………………7 4. Neutrons…………………………………………………..…………...7 IV. How are pollutants transported through water?.........
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ores such as pitchblende‚ uraninite‚ carnotite‚ and autunite. It can also be found in phosphate rock‚ lignite (brown coal) and monazite sand. There three different types of isotopes that can be found: uranium-234‚ uranium-235 and uranium-238. All three isotopes are radioactive‚ but uranium-235 is the only fissionable isotope that can be used for nuclear power. (Gagnon) Uranium-235 makes up about 0.7 percent of the uranium that can be found naturally. It can be used for both nuclear power production
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|WEEK |LEARNING OBJECTIVES |LEARNING OUTCOMES |ACTIVITIES |REMARKS | |1 |FORM 4 ORIENTATION | | |4/1 – 6/1 |
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On the morning of August 6‚ 1945‚ a B-29 bomber named Enola Gay flew over the industrial city of Hiroshima‚ Japan and dropped the first atomic bomb ever. The city went up in flames caused by the immense power equal to about 20‚000 tons of TNT. The project was a success. They were an unprecedented assemblage of civilian‚ and military scientific brain power-brilliant‚ intense‚ and young‚ the people that helped develop the bomb. Unknowingly they came to an isolated mountain setting‚ known as Los Alamos
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Mendel’s ‘factors’ are now called genes Genotype refers to the specific allelic composition of an individual Independent assortment: During gamete formation‚ the segregation of any pair of hereditary determinants is independent of the segregation of other pairs Random sampling error N+N sperm N egg 3n endosperm Degrees of freedom Tetrad (bivalent) Mitosis produces daughter cells that are genetically identical Meiosis produces daughter cells that are not genetically identical
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M12/4/PHYSI/HP3/ENG/TZ2/XX 22126515 Physics Higher level Paper 3 Candidate session number 0 0 Examination code Friday 11 May 2012 (morning) 2 1 hour 15 minutes 2 1 2 – 6 5 1 5 INSTRUCTIONS TO CANDIDATES • • • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options. Write your answers in the boxes provided. A calculator is required for this paper. A clean copy of the
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