# Write the molecular formula of water.

Water is a molecule consisting of atoms like oxygen and hydrogen. There are two hydrogen atoms and one oxygen atom. Hydrogen is the element with atomic number $1$ and has one valence electron. Oxygen is an element with atomic number $8$ and has six valence electrons. These three atoms have eight valence electrons and form three covalent bonds. Thus, six electrons were utilized. The remaining four electrons exist as lone pairs on oxygen atoms.
Due to the presence of two lone pairs of electrons, water molecules are bent or V-shape. The hybridization of water molecules is $s{p^3}$ . The bond angle of water is ${104.5^0}$, which is less than the normal bond angle exhibited by tetrahedral or $s{p^3}$hybridization molecules. Due to the repulsions between the lone pairs on oxygen atoms in the water molecule.
Thus, the molecular formula of water is ${H_2}O$.