Answer
C
Work Step by Step
Mass number $A=23$
Number of neutrons: $n^0=12$
Number of protons: $A=p^++n^0\rightarrow p^+=Z=11$
From the periodic table, that atom is sodium (Na).
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 2 Atoms, Molecules, and Ions - 2-2 Atomic Number and Atomic Mass - Review & Check for Section 2-2 - Page 48: 2
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