Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 2 - Questions and Problems - Page 76: 2.17

Answer

All atoms of an element have the same amount of protons; that is what makes each element different; but, they can have different mass numbers as neutrons can differ but # of protons determines element. Isotopes differ in neutron numbers.

Work Step by Step

All atoms of an element have the same amount of protons; that is what makes each element different; but, they can have different mass numbers as neutrons can differ but # of protons determines element. Isotopes differ in neutron numbers.
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