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Tardigrade
Question
Chemistry
Which of the following will have total number of d- electrons equal to the difference in the number of total p and s electrons?
Q. Which of the following will have total number of
d
−
electrons equal to the difference in the number of total p and s electrons?
1928
195
Classification of Elements and Periodicity in Properties
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A
He
5%
B
Ne
6%
C
Ar
7%
D
Kr
82%
Solution:
The first inert gas which contains d electrons is in
4
t
h
period i.e., Kr with atomic no. = 36
E.C. of
Kr
=
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
10
4
p
6
Total number of d-electrons
=
10
Total number of p-electrons
=
6
+
6
+
6
=
18
Total number of s-electrons
=
2
+
2
+
2
+
2
=
8
Difference in
p
and
s
electron is
=
18
−
8
=
10