Carbon and hydrogen
Calcium and oxygen
Oxygen and neon
Sodium and magnesium
They have low melting point.
They are usually soluble in water.
They can conduct electricity in liquid form.
They have high boiling point.
It becomes neutral charged.
It becomes negatively charged.
It becomes positively charged.
It becomes both positively and negatively charged.
The ions are held in fixed positions.
The ions are able to move in liquid and molten state.
The electrons are able to move.
The atoms are able to move in liquid and molten state.
It loses six electrons to become stable.
It gains three electrons to become stable.
It loses two electrons to become stable.
It shares two pairs of electrons with another atom to become stable.
Soluble in organic solvents.
Insoluble in water.
Conduct electricity in solid state.
Conduct electricity in molten and aqueous state.