Answer
See the answer below.
Work Step by Step
From the given information, the electronic configuration is:
$1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 4s^2$
a) 20, same as the number of electrons
b) 8
c) 12
d) 0
e) Metal, it's in group 2.
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 7 The Structure of Atoms and Periodic Trends - Study Questions - Page 281b: 41
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