## Chemistry (12th Edition)

Published by Prentice Hall

# Chapter 4 - Atomic Structure - 4.3 Distinguishing Among Atoms - Sample Problem 4.2 - Page 114: 18

#### Answer

a) 45 neutrons b) 16 neutrons c) 61 neutrons d) 125 neutrons

#### Work Step by Step

The formula for neutrons is Neutrons = Mass - Atomic number a) given mass= 80 and Atomic number = 35 we substitute it into the equation and find the neutrons. Neutrons = Mass - Atomic number Neutrons = 80 - 35 Neutrons = 45 neutrons b) given mass= 32 and Atomic number = 16 we substitute it into the equation and find the neutrons. Neutrons = Mass - Atomic number Neutrons = 32 - 16 Neutrons = 16 neutrons c) given mass= 108 and Atomic number = 47 we substitute it into the equation and find the neutrons. Neutrons = Mass - Atomic number Neutrons = 108 - 47 Neutrons = 61 neutrons d) given mass= 207 and Atomic number = 82 we substitute it into the equation and find the neutrons. Neutrons = Mass - Atomic number Neutrons = 207 - 82 Neutrons = 125 neutrons

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