Number of valence electrons present in 3.2 g of S–2 ion will be Options: 0.6 × NA Should have chosen 0.8 × NA 1.2 × NA Wrong 1.6 × NA

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({N a}^{+})

(O^{2 -})

The total number of valence electrons in 4.2 gm of ${N_{3}}^{-}$ ion is ( $N_{A}$ is the Avogadro's number)

What is the number of valence electrons in :

(a) sodium ion, Na⁺

(b) oxide ion, O^2–

N_{3}^{-}

N_{A}

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