Environmental Science for AP* (2nd Edition)

Published by W. H. Freeman
ISBN 10: 1464108684
ISBN 13: 978-1-46410-868-6

Chapter 2 - Module 4 - Systems and Matter - AP Review Questions - Page 42: 1


(c) number of neutrons

Work Step by Step

The number of protons in a chemical element is always constant; however, atoms of the same element with a different number of neutrons are called isotopes. ex. carbon-12 has 6 protons and 6 neutrons carbon-14 has 6 protons but 8 neutrons
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