Chemistry: Atoms First (2nd Edition) Chapter 1 - Exercises - Page 51d 48

Answer

a. 12 protons, 12 neutrons and 12 electrons. b. 12 protons, 12 neutrons and 10 electrons. c. 27 protons, 32 neutrons and 25 electrons. d. 27 protons, 32 neutrons and 24 electrons. e. 27 protons, 32 neutrons and 27 electrons. f. 34 protons, 45 neutrons and 34 electrons. g. 34 protons, 45 neutrons and 14 electrons. h. 28 protons, 35 neutrons and 28 electrons. i. 28 protons, 35 neutrons and 26 electrons.

Work Step by Step

The number of protons is equal to the atomic number of the element. The number of neutron is equal to mass number - number of protons. The number of electrons will be equal to number of proton in neutral atom but a single positive charge means that there one electron less than number of proton and a single negative charge means that it have one electron more than number of proton. So the number of electrons can be calculated as number of protons - charge of ion. a. 12 protons, 12 neutrons and 12 electrons. b. 12 protons, 12 neutrons and 10 electrons. c. 27 protons, 32 neutrons and 25 electrons. d. 27 protons, 32 neutrons and 24 electrons. e. 27 protons, 32 neutrons and 27 electrons. f. 34 protons, 45 neutrons and 34 electrons. g. 34 protons, 45 neutrons and 14 electrons. h. 28 protons, 35 neutrons and 28 electrons. i. 28 protons, 35 neutrons and 26 electrons.

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