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Which of the following does not have valence electron in 3d-subshell?

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Which of the following does not have valence electron in 3d-subshell?

(a) Fe (III)

(b) Cr (I)

(c) Mn (II)

(d) P (0)

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1 Answer

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Best answer

The correct option is (d) P (0).

Explanation:

Phosphorus (P) has electronic configuration 

1s2, 2s2, 2p6. 3s2, 3p3 

Therefore, no valence electron is present in the 3d-subshell. 

Fe (III) has electronic configuration : 3d54s0 

Cr(I) : 3d5 4so 

Mn (II) :3d5 4s0

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