Fall+final+exam+review+answers

Fall final exam review answers

Chapter 1-2 fall exam review 1C, 2B, 3C, 4A, 5C, 6B, 7D, 8A 9tungsten, 10A, 11A 12 copper, 13B, 14C 15 A 16C, 17 A 18 5, 19 A, 20C 21 A, 22B, 23 B, 24 B,25 B, 26 A, 27 C, 28 3, 29 1.21 g/mL 30 0.83L, 31 8.17g/mL, 32 F, O, Cl, 33 1 atom potassium, 1 atom manganese, 4 atoms oxygen, 34 based on boiling points. used to separate liquid mixture, 35 metals - hard, high melting points, conduct heat and electricity, malleable, ductile, mostly solids. nonmetals - low melting points, low density, can't conduct heat or electricity, mostly gases, solids are brittle. metalloid - in between metals and nonmetals, can conduct heat and electricity a little, low melting points but not as low as nonmetals, soft to somewhat hard.. 36. mixture - physically combined elements or compounds. 2 types - heterogeneous and homogeneous pure substance - chemically put together; elements or compounds.

Chapter 3 fall exam review 1.B, 2D, 3. A, 4D, 5D, 6A, 7B, 8D, 9A, 10 C, 11C 12D, 13D,14D,15B, 16 number of neutrons, 17 number of neutrons 18. gas - unorganized, high energy, no set volume or shape, liquid - somewhat organized, medium energy, set volume, not set shape. solid - organized, set shape and volume, low enery. 19 Mendeleeve - first to design the periodic table, used atomic mass. Moseley - reorganized based on atomic number 20 accuracy - how close to what it should be. precision - how close together several trials are to each other. 21. chemical change - causes a change in the substance. physical change - no change in the substance, but look, or state may change. chemical properites - relate to chemical change ie change in color. physical properties - relates to physical change such as change in state liquid water to frozen water. 22. 4 parts to Dalton's theory. elements made of atoms, all atoms of an element are alike, atoms are not created or destroyed just changed during a reaction, and in a reaction, atoms combine in whole number ratios. 23. As, 24. 1s2 2s2 2p2 25 1s2 2s2 2p6 3s2 3p6 4s2 3d10 or [Ar] 4s2 3d10 26 2 neutrons, 27 a quantum of energy forces electrons to higher energy level (excited state) as the electron falls back to the ground state, a photon is released. 28. 3.3 x 10 14 Hz,(don't forget: 900nm must be changed to meters) 29. 181 nm, 30. 1.49 x 10 -19J, 31. 3.05 x 10-19 J 32.11g 33 a atomic theory, law of multiple proportions b. positive nucleus using gold foil experiment c. neutron d. electron using cathode ray tube e. law of defininte proportions f. convinced everyone ok to talk about the atom without it being heresy g. law of conservation of mass h. first to talk about the atom i proton

Chapter 4 part I 1D, 2C, 3B, 4D, 5A, 6B, 7A, 8D, 9C, 10B, 11B, 12B, 13C, 14D, 15 C, 16 C, 17 D, 18B, 19 Na3N, 20 MgBr2, 21 CuCl2, 22 organized structure of ionic compounds, 23 dinitrogen tetraoxide 24 2Na + Cl2 --> 2NaCl

chapter 4 part II 1. 6.02x10 23 atoms or 6.02 x 1023 particles, molar mass or atomic mass 2. combustion - hydrocarbon and oxygen yields carbon dioxide and water, neutralization: acid + base yields salt + water, precipitation: at least one product is a solid. 3. ionic compound without an H+ or an OH- 4. taken from the balanced equation to equate one element or compound to another in the reaction 5. limiting reactant: the reactant that runs out first or yields the smallest amount of the product. Theoretical yield: amount of product produced by the limiting reactant. 6. a. 1,3,2; b. 2,1,2,1 7. Mg + 2CuNO3 --> 2 Cu + Mg(NO3)2 8. a. neutralization, b. precipitation, c. combustion 9a. carbon dioxide and water, b. water and RbCl 10 492.5g 11. 342.17g 12 101 g, 1.5 x10 24 particles 13. 1.9x10 23 atoms 14. 0.46 moles 15. 2.5 x 10 23 atoms 16. 3.5g, 17. Al + P --> AlP, 16.1 g 18. LR = Na and TY = 56.6g 19. LR = HCl, and TY = 54.0g

Chapter 12 final exam review 1. a. alpha particle b. 237,93 Np--> 4,2 He + gamma + 233, 91 Pa, c. 234,91 Pa 2. 1.88 g, 48 days (do your chart) 3. alpha - helium atom, high ionizing (dangerous to humans if swallowed) and low penetrating, piece of paper can stop it. beta - electron, result of neutron breaking down into a proton and an electron. medium ionizing and medium penetrating. stopped by aluminum foil or wood. gamma - no mass, no charge, high penetrating (makes extremely dangerous to humans), low ionizing 4. conventional bomb with radioactive material 5. he was covering a photographic plate and exposing it to a rock and then to the sun and then developing it to see the image of the rock. When it rained for a week, he couldn't expose it to the sun, but he still got the same results meaning that it was not phosphorescence. It was the beginning of the study of radiation. 6. 2 Noble prizes, discovered raidum and polonium, first female pHD in France, first female to teach at the Sorbonne, coined term radioactive. 7. break down of the cells in the body due to massive doses of radiation. Body breaks down and stops functioning. Have nausea, bleeding etc. 8. the reactor core is where fission takes place causing the water to heat. the steam is then taken through the steam lines to the turbines which turn from the steam generating electricity and the water is taken through the cooling system so that it is cooled and released into the environment. 9. fission - splitting of large nucleus into 2 smaller nuclei. used in power plants fusion - joining of two smaller nuclei to make a large nucleus - sun and stars 10. process behind glow in the dark toys. Light (sunlight) is absorbed and then when placed in the dark, the item glows. 11. (14 on your sheet a typo)a. years 0, 5730, 11460, 17190, 22920, 28650, 34380 and grams: 425, 212.5, 106.25, 53.125, 26.56, 13.28, 6.64 b. graph looks like typical half life graph c. abouy 17000 years.