Question

An ionic compound is formed by :

• A. a metal cation and a non-metal anion
• B. a metal anion and a non-metal cation
• C. a metal and a non-metal atom
• D. any two molecules as long as they are different
• E. a covalently bonded molecule

Answer 1

The correct option is A a metal cation and a non-metal anion

Ionic compound is formed by the metal cation and a non-metal anion.
Example:
$N{a}^{+}$ is cation formed from the $Na$ metal by the removal of 1 electron.
Whereas $C{l}^{-}$ anion is formed from the $Cl$ non-metal by gaining one electron, then by electrostatic force of attraction these combine to form a ionic compound.