Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95a: 15


$_{27}^{57}Co$, $_{27}^{58}Co$ and $_{27}^{60}Co$ respectively.

Work Step by Step

From the periodic table for cobalt (Co) $Z=27$ Since $A=Z+n$, with the given number of neutrons of 30,31 and 33, the mass numbers are $A=57$, $A=58$, $A=60$, respectively, so their symbols are: $_{27}^{57}Co$, $_{27}^{58}Co$ and $_{27}^{60}Co$ respectively.
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