Question

The electronic configuration of an atom is as follows: 1s2

2s2

2p6

3s2

3p6

4s1

3d5

.

a)Which elements atom is it?

b) Which orbital the last electron is?

c) Is the above written configuration correct?

d) Give reasons why there is single electron filled in 4s orbital​

Answer 1

Answer:

a.chromium

b.d orbital

c.yes

d.bcoz 3d is unstable so 1e from s gets excited and moves to 3d. so it becomes 4s1

Explanation:

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