JAMB - Chemistry (2024 - No. 36)
Na\(_2\)X ⇌ 2Na\(^+\) + X\(^{2-}\)
The bond between Na and X is likely to be
covalent
dative
ionic
metallic
Selitys
Sodium is a metal and X is a non-metal, so the bond between them is ionic. Ionic bonds form when a metal bonds with a non-metal.
Element X receives 2 electrons from Na metal and became negatively charged.