Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 19 - Sections 19.1-19.12 - Exercises - Review Questions - Page 945: 3

Answer

A represents the mass number, which is the number of protons + the number of neurons. Z represents the atomic number, which is the number of protons. X is the chemical symbol of the element.

Work Step by Step

A represents the mass number, which is the number of protons + the number of neurons. Z represents the atomic number, which is the number of protons. X is the chemical symbol of the element.
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