Covalent bonding: The sharing of a pair of electrons between two atoms.
NON-METAL - NON-METAL BONDING.
In a covalent bond, one electron comes from each atom.
An Example would be:
Chlorine molecule. the shared pair of electrons are the O-X in the middle. Written as Cl-Cl.
Covalent bonding, Example 1: Methane
In methane, there is 4 covalent bonds.
Covalent bonding, Example 2: Ethane
Ethane looks a little different to other molecules... But the principle is still the same.