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A `M^(+2) ` ion derved fromn a metal in the first transition metal series has four electrons in 3d subshell , what element may m be:
A. S
B. Cr
C. Mn
D. Se

1 Answer

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Best answer
Correct Answer - b
`Cr to [Ar ] 4s^(1) 3d^(5) `
` Cr ^(2+) to [Ar] 4s^(0) 3d^(4)`

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