Cations are usually made from metals and anions are usually made from nonmetals, but there is one cation in ionic solids which is made from non metallic elements. The elements are

Options

A. N and H
B. H and O
C. P and H
D. N and O

Answer

A

Explanation

It is `NH_4^(+)` present in ammonium salts such as ammonium nitrate `NH_4^(+)NO_3^(-)`. Note that hydronium ion, `H_3O^(+)`, exists only in aqueous solution.