Give the electronic configuration of the following particles:
Q. Give the electronic configuration of the following particles:
(a) 5c3+ (b) Br- (c) pb1y pb2+ (d)
Fe, Fe2+1y Fe3+
Solution:
(a) 21 5c3+ = [Ar], 3d0,
4s0
5c3+ = 152,
2s2, 2p6, 3s2, 3p6
(b) Br- (Atomic no. 35)
No of
electrons in Br- = 36
Br- =
152, 252, 2p6, 352, 3p6,
3d10, 4s2, 4p6
(c) Pb2+ (Atomic no 82)
No of
electrons in pb2+ = (82-2)
= 80
Pb =
152, 252, 2p6, 352, 3p6,
3d10, 4s2, 4p6, 4d10, 4f14,
5s2, 5p6, 5d10, 5f0, 6s2,
6p2.
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