CHEM 112 Chapter Notes -Atomic Number, Net Force
Document Summary
Homework: topic 1 atomic structure & coulomb"s law [chap. Relatively simple applications of basic definitions and basic laws. Numbers in brackets, e. g. [10], are assigned problems. These are problems similar in level of difficulty to test problems. Numbers in curly brackets, e. g. {10} are challenging" problems. Atomic structure: (1) ordinary copper (z cu a) is atomic number 29 (z) and mass number 64 (a). Ans: a) 29 b) 29 c) 35 (2) an isotope of germanium (ge) has 2 extra neutrons. The atomic mass of aluminum is 27. 0 g/mol, and its atomic number is 13. Coulomb"s law: (5) two equal point charges of 3. 0 x 10-6 c are placed 0. 20 m apart. [1] a solid cube of copper has a mass of 4 kg. Ans: a) 4. 49 x 10-4 m3 ; b) 7. 99 cm; c) 62. 95 moles; d) 3. 79 x 1025 atoms; e) 1. 099 x 1027 electrons; f) 1. 099 x 1027 protons; g) 1. 327 x 1027 neutrons.
