Explain why water is H2O, not HO2. Use the words valence electrons, atoms and molecules in your answer.

Water (H 2O) is a simple triatomic bent molecule with C2v molecular symmetry and bond angle 2O, explaining and rationalizing the various electronic and physical. In other words, if water was formed from two identical O-H bonds and two ... In contrast to localizing electrons within their atomic orbitals in valence bond.

Here, Hydrogen is having the positive ion is placed at the first and oxygen is having negative ion is placed at the second position. Here, Hydrogen is having the positive ion is placed at the first and oxygen is having negative ion is placed at the second position. Therefore, it is written as H2O and not HO2.