Question

Write chemical formulae for the molecules of: oxygen, copper, nitrogen, chlorine and zinc.

Answer 1

Chemical formula:

• The chemical formula represents one molecule of an element or a compound.
• A chemical formula for a molecule is represented by the group of symbols of the elements that constitute the molecule, and the number of atoms of each element present in one molecule.
• The chemical formula of oxygen is ( ${\mathrm{O}}_2$), copper is ($\mathrm{Cu}$ ), nitrogen is (${\mathrm{N}}_2$ ), chlorine( $\mathrm{Cl}$), and zinc is ($\mathrm{Zn}$ ).