Question

Match the compound with the state of H atom that it possess.

• A. $H^{+}$
• B. $H^{-}$
• C. Neutral charge on H

Answer 1

In $H_{2}O$, the hydrogen atom is attached to a highly electronegative atom and thus, the elecron shifts towards the $O$ atom and the result is a highly polarised $H^{+}$ atom.

In $NaH$, the H atom is attached to a highly electropositive element that has a high tendency to lose an electron, which is gained by the H atom. Thus, $H^{-}$ ion is formed.

In $C{H}_4$, C and H are of similar electronegativities and thus, both share their electrons, forming a covalent bond and remain neutral.