Which of the following pairs represent isoelectronic species?

S^{2 -}

and

S c^{3 +}

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S O_{2}

and

N O_{3}^{-}

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N_{2}

and

C N^{-}

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N H_{3}

and

H_{3} O^{+}

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Solution

The correct options are
A $S^{2 -}$ and $S c^{3 +}$
B $N_{2}$ and $C N^{-}$
C $S O_{2}$ and $N O_{3}^{-}$
D $N H_{3}$ and $H_{3} O^{+}$
Species having the same number of electrons are known as isoelectronic.

$S^{2 -}$ and $S c^{3 +} = 18$ electrons ( $16 + 2$ for sulphur, $21 - 3$ for scandium)

$S O_{2}$ and $N O_{3}^{-} = 32$ electrons( $16 + 16$ for $S O_{2}$ and $7 + 24 + 1$ for $N O_{3}^{-})$

$N_{2}$ and $C N^{-} = 14$ electrons ( $7 + 7$ for $N_{2}$ and $6 + 7 + 1$ for $C N^{-})$

$N H_{3}$ and $H_{3} O^{+} = 10$ electrons ( $7 + 3$ for $N H_{3}$ , $3 + 8 - 1$ for $H_{3} O^{+})$

Hence, options A, B, C, and D are correct.

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Similar questions

N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, H N_{3}

Among the following species, identify the iso-structural pairs.

$N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, N_{3} H$

Among the following species, identify the isostructural pairs,
$N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, H N_{3}$

N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}

Among the following species identify the isostructural pairs :

$N H_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, H N_{3}$

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