Lewis Dot of the Ammonium 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).
Ammonium has a tetrahedral shape with bond angles of 109.5o.
It contains 3 polar covalent bonds and 1 coordinate covalent bond.