Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 6 - Electronic Structure of Atoms - Exercises: 6.71c

Answer

A "2s" subshell can hold 2 electrons.

Work Step by Step

Since any "s" subshell has 1 orbital, and each orbital can hold 2 electrons, a "2s" subshell can hold 2 electrons. Remember that, the shell number ("2") from "2s", has nothing to do with the capacity of electrons. A "3s" subshell can hold 2 electrons, and a "4s" too.
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