Answers+to+fall+reviews

Answers - Fall Reviews Chapter 3: 1.b 2a 3c 4b 5c 6a 7b 8b 9c 10a 11c 12b 13a 14c 15d 16d 17b 18d 19a 20b 21 3000 hZ 22.4X10 -19 j 23. 39.96 24. Ge 25 1S2 2S2 2P6 3S2 4S2 3D10 4P6 5S2 4D10 5P1 OR [kR] 5S2 4D10 5P1 26. 1S2 2S2 2P6 3S2 3P6 4S2 3D5 27 LAW OF DEFINITE PROPORTIONS BECASUE p2o5 IS ALWAYS P2O5. 28. he used a cathode a ray tube. the ray moved toward the magnet if it was a + end and away from the magnet if it was the negative end. This occurred with all gases so it it meant that electrons were in all elements. 29. elements consist of tiny particles called atoms. all atoms of an element are identical. chemicl reactions occur when atoms are separated, joined or rearranged in whole number ratios. atoms are not destroyed or changed or created in a chemical reaction. this last part supports the law of conservation of mass. 30. he used a closed system. 31. continuous = all wavelengths. line = unique to each element with only certain wavelengths. 32. democritus - atom. Proust - law definite proportions. Chadwick - neutron. Goldstein - proton. Rutherford - atom had a positive nucleus and was made up of mostly empty space. 33. at ground state, electrons absorb a quantum of energy and move to an excited state. In the excited state, as they release energy to return to the ground state or a lower level, energy is released in the form of light. in fireworks, you need to know the which chemicals give what colors based on their line spectrum. 34 proton - + in nucleus, electron - negative, around the nucleus, neutron - no charge, in nucleus. 35. Gassendi said it was ok to talk about the atom. Before this it was against the Bible/religion to mention the atom. Chapter 2: 1E 2C 3B 4B 5C 6B 7D 8C 9B 10B 11A 12B 13A 14A 15A 16 JUDGEMENT, EXPERIENCE, COMMON SENSE 17 chemical - a reaction occurs 18 different mixture of soil 19 comes closer to the the real value - more precise 20 gives a systematic way to approach the problem which works for all disciplines 21. 66000000gitz or 70000000gitz 22a 24520000ug 22b 8 x10 -4 g/mL 23a 920000cg b. 0.050dL c 4000.8mg/s 24. m=82.9g 25 metal is brass, graph is a straight line running through (.5, 6) and (5, 42)

Chapter 1 1B 2D 3C 4D 5D 6B 7A 8D 9B 10C 11C 12A 13B 14C 15D 16A 17C 18A 19D 20C 21A 22B 23C 24A 25D 26D 27A 28B 29C 30C 31Damerena was a DEA agent who was kidnapped and murdered in Mexico. The Mexican government said that he was murdered by a small drug family and buried there - the Bravo ranch. However, the FBI agent Raolt said that the mixture of soil on the bodies (a pilot had also been murdered and buried on the ranch) was not the same as the mixture in the grave. It later was discovered that the dirt matched a mountainous area. 32. matter ahs mass and takes up space. Pure substance - uniform composition and cannot be physically separated. Mixture - 2 or more substances physically combined 33. distillation - separation by boiling points. chromatography - separation by size and solubility. filtering and evaporation. 34. wear goggles, aporn. no horseplay, ask before working, hair must be pulled back, etc.35. Mendeleev first arranged by atomic mass. Moseley next arranged by atomic number and we still use this one today. Periods = rows, groups = columns. metals make up most of the elements. nonmetals - on the right side and are the most abundant after metals. Metalloids are the fewest elements and are along the stairstep. 36. distillation 37no, need matter to show the movement. 38. N2O5, 39 metalloid, 40 Sr, solid, 2, 775, somewhat, silvery white.