Lewis Dot of the Hydronium Ion
Since all the atoms are in either period 1 or 2, this molecule will adhere to the octet rule.
The exception, of course, being the hydrogen's. They follow the duet rule (2 electrons).
Hydronium is the positive ion present in Arrhenius acid solutions. It is formed from a hydrogen ion and water bonding.
Hydronium contains 2 polar covalent bonds and 1 coordinate covalent bond.