Calculate the formal charge of NH4 + and the electronegativity value and state whether it is a ionic, covalent,or polar covalent
The formal charge of NH4+ can be calculated as follows:
Formal charge = Number of valence electrons in neutral atom - (number of lone pair electrons + 1/2 * number of bonding electrons)
In NH4+, nitrogen has 5 valence electrons and is bonded to 4 hydrogen atoms. The number of lone pair electrons on nitrogen is 0, and the number of bonding electrons is 4 * 2 (since each hydrogen atom contributes one electron to the bond).
Therefore, formal charge = 5 - (0 + 4 * 2) = 5 - 8 = -3
The electronegativity value of nitrogen is 3.04, and the electronegativity value of hydrogen is 2.20.
NH4+ is a covalent compound. The bond between nitrogen and hydrogen is polar covalent due to the difference in electronegativity values between the two atoms.