The atomic number of cobalt is 27. The EAN of | vedclass

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(B) The oxidation state of $Co$ in $Na_{3}[Co(NO_{2})_{4} Cl_{2}]$ is calculated as follows:$3(+1) + x + 4(-1) + 2(-1) = 0$$3 + x - 4 - 2 = 0$$x - 3 =

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$36$

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(B) The oxidation state of $Co$ in $Na_{3}[Co(NO_{2})_{4} Cl_{2}]$ is calculated as follows:$3(+1) + x + 4(-1) + 2(-1) = 0$$3 + x - 4 - 2 = 0$$x - 3 = 0$$x = +3$The $EAN$ (Effective Atomic Number) is given by the formula:$EAN = (	ext{Atomic number of metal}) - (	ext{Oxidation state of metal}) + 2 	imes (	ext{Coordination number})$$EAN = (27 - 3) + 2 	imes 6$$EAN = 24 + 12 = 36$.

The atomic number of cobalt is $27$. The $EAN$ of cobalt in $Na_{3}[Co(NO_{2})_{4} Cl_{2}]$ is

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