# Which portion of the compound lithium nitrate, LiNO_3, is a covalently bonded polyatomic ion?

Jul 31, 2017

$\text{Lithium nitrate}$ features the $L {i}^{+}$ ion..........
with a $\text{nitrate counterion}$, $N {O}_{3}^{-}$.
The Lewis structure of nitrate features THREE formally charged atoms......i.e. a quaternized nitrogen $\stackrel{+}{N}$, and two oxygen anions..............of course the formal charge is still $- 1$.
""^(-)O-stackrel(+)N(=O)-O^-, and of course the negative charges are distributed all over the molecule. VESPER predicts a trigonal planar geometry for the 12 electron pairs......Clearly the nitrate ion is covalently bound, and its Lewis structure reflects this.