Answer
It is likely an alkali earth metal
Work Step by Step
The third ionization energy has a much larger energy jump. This can be assumed to be the next period thus the element has two valence electrons so it is an alkali earth metal
Chemistry (7th Edition)
by McMurry, John E.; Fay, Robert C.; Robinson, Jill Kirsten
Published by
Pearson
ISBN 10:
0321943171
ISBN 13:
978-0-32194-317-0
Chapter 6 - Ionic Compounds: Periodic Trends and Bonding Theory - Conceptual Problems - Page 218: 24
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