Materials Science and Engineering: An Introduction

Published by Wiley
ISBN 10: 1118324579
ISBN 13: 978-1-11832-457-8

Chapter 2 - Atomic Structure and Interatomic Bonding - Questions and Problems: 2.1


The atomic weights of the elements generally aren't integers because: the atomic weight is taken as the weighted average of the atomic masses of an atom's naturally occurring isotopes, and because the atomic masses of the atoms normally are not integers.

Work Step by Step

An isotope is a version of an atom that has the same number of protons, but a different number of neutrons.
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