Question

The common charge on the atom containing 17 protons, 18 neutrons and 18 electrons is:

• A. $-1$
• B. $-2$
• C. $0$
• D. $+1$

Answer 1

The correct option is A $-1$

The atom having $17$ protons means it is chlorine. The valency of chlorine is $1$ and as it is electronegative in nature it readily accepts one electron to give $-1$ oxidation state which is the case here since it has an extra 1 electron.