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AIEEE 2003 Chemistry Solved Paper
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© examsnet.com
Question : 3
Total: 76
The number of d-electrons retained in
Fe
2
+
(At no of
Fe
=
26
) ion is
4
5
6
3
Validate
Solution:
Fe
(
Z
=
26
)
→
e
−
=
26
Fe
2
+
(
Z
=
26
)
→
e
−
=
24
Electronic configuration:
Fe
(
Z
=
26
)
→
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
6
4
s
2
Fe
2
+
(
z
=
26
)
→
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
6
4
s
0
as
4
s
is the outermost shell of Fe that's why
e
−
will always removed first from
4
s
, so retained
e
−
in
d
−
shell is 6
© examsnet.com
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