Question

Nitrogen atom has an atomic number of $7$ and oxygen has an atomic number $8$ . The total number of electrons in anitrate ion will be

• A. $8$
• B. $16$
• C. $32$
• D. $64$

Answer 1

Answer: (C)

Number of electrons in nitrogen = $7$ and number of electron in oxygen = $8$ we know that formula of nitrate ion is $N{O}_3^{-}$we also know that number of electron
= ($1\times$ Number of electrons in nitrogen) + ( $3\times$ number of electrons in oxygen) + $1$
= $(1\times 7)+(3\times 8)+1=32.$