as usual, google is your friend. See
chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_ChemPRIME_(Moore_et_al.)/07Further_Aspects_of_Covalent_Bonding/7.01%3A_Exceptions_to_the_Octet_Rule
How does N in NF3 obey octet rule
1 answer