The most common molecule on earth is SiO2.
NaCl is a molecule composed of two atoms Na and Cl.
Sodium chloride is an example of a common table salt.
NaCl
Sodium chloride is not an atom, so it doesn't have an atomic number.
One atom of chlorine per molecule of NaCl.
A molecule of NaCl (Sodium chloride) is comprised of Sodium and Chlorine.
Water (H2O) and salt (NaCl).
Today NaCl is considered the formula unit of sodium chloride, not the true chemical formula of the molecule; NaCl form very complex lattices, as other ionic salts.
NaCl
The term molecule is not adequate for sodium chloride because NaCl form large lattices. More exact is formula unit - NaCl.
Cl2 is covalent. NaCl is ionic.
A common and abundant inorganic molecule found in animals is Sodium Chloride (NaCl), commonly known as sa't