Atomic number of Cobalt = 27 Electronic configuration of Co is [Ar]3d74s2 It loses two electrons from 4s orbital to form CO+2 ion. Electronic configuration of Co+2 is [Ar]3d7
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Similar Questions
Q1
Sc−[Ar]3d14s2Ca−[Ar]4s2Mg−[Ne]3s2Co−[Ar]3d74s2 What are the use of writing electronic configuration this fashion?
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Q2
Statement I : Ground state electronic configuration of chromium atom is (Ar)4s13d5. Statement II: Exchange energy is more wtih (Ar)4s13d5 then (Ar)4s23d4.
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Q3
Which rule explains the electronic configuration of chromium is [Ar] 3d54s1 instead of [Ar]3d44s2?
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Q4
Listed below are the electronic configuration of five elements. Arrange the elements in the increasing order of metallic character:
(a) [Ar]3d104s2
(b) [Ar]4s2 (c) [Ar]3d104s24p65s2
(d) [Ar]3d104s24p5 (e) [Ar]3d104s24p65s1
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Q5
Sc−[Ar]3d14s2Ca−[Ar]4s2Mg−[Ne]3s2Co−[Ar]3d74s2 Write down the group and period of each element.