# Which of the following, the highest oxidation state is achieved by: Option 1) $(n-1)d^{5}ns^{2}$ Option 2) $(n-1)d^{5}ns^{1}$ Option 3) $(n-1)d^{3}ns^{2}$ Option 4) $1 (n-1)d^{8}ns^{2}$

P Plabita

Electronic configuration of d block elements -

These elements have other electronic configuration of   $(n-1)d^{1-10}ns^{1-2}$

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Let see the oxidation state achieved by each one.

$(n-1)d^5ns^2=+7$

$(n-1)d^5ns^1=+6$

$(n-1)d^3ns^2=+5$

$(n-1)d^8ns^2=+2$

Option 1)

$(n-1)d^{5}ns^{2}$

Correct

Option 2)

$(n-1)d^{5}ns^{1}$

Incorrect

Option 3)

$(n-1)d^{3}ns^{2}$

Incorrect

Option 4)

$1 (n-1)d^{8}ns^{2}$

Incorrect

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