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Problem
Problem
The ion of element X has a 2+ charge and contains 20 protons. Give the full electron configuration of this ion. a.
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
1s^22s^22p^63s^23p^6
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
b.
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
1s^22s^22p^63s^23p^64s^2
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
c.
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
2
1s^22s^22p^63s^23p^63d^2
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
2
d.
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
2
1s^22s^22p^63s^23p^64s^23d^2
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
2
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