There are three isotopes of hydrogen and three naturally occuring isotopes of oxygen (""^(16)O, ""^(17)O and ""^(18)O). How many kinds of water molecules are possible . Write their formulae.

There are three isotopes of hydrogen and three naturally occuring isot

1.	There are three isotopes of hydrogen and three naturally occuring isotopes of oxygen (""^(16)O, ""^(17)O and ""^(18)O). How many kinds of water molecules are possible . Write their formulae.
Answer» SOLUTION :18 . Their formulae are : `H-""^(16)O-H, H-""^(17)O-H, H-""^(18)O-H, H-""^(16)O-D, H-""^(17)O-D,H-""^(18)O-D,H-""^(16)O-T,H-""^(17)O-T,H-""^(18)O-T, D-""^(16)O-D,D-""^(17)O-D,D-""^(18)O-D,T-""^(16)O-D,T-""^(17)O-D,T-""^(18)O-D,T-""^(16)O-T,T-""^(17)O-T,T-""^(18)O-T` However, most abundant HEAVY water occuring in ordinary water is DEUTERIUM oxide, i.e., `D-""^(16)O-D`.