Neither, lithium nitride is ionic. It has a very unusual lattice (see link) and is a "fast ion conductor" - meaning that it does something really unusual - the ions are free to move ( a bit) and it conducts electricity.
nonpolar
These terms are not applicable for sand.
=a polar solvent dissolves a polar solute, and nonpolar solvents dissolve nonpolar solutes. likes dissolve likes=
H2O is a polar molecule; +H3O is even more so.
Orange juice is a mixture not a compound.
Nonpolar
nonpolar
It is nonpolar
nonpolar
nonpolar
nonpolar
nonpolar. The fat molecules in peanut butter are nonpolar, that is why peanut butter doesn't evenly mix with water, a polar substance.
Polar
polar
Polar substances dissolve other polar substances, and nonpolar substances dissolve other nonpolar substances. A polar substance cannot dissolve a polar substance and a nonpolar substance cannot dissolve a polar substance.
Li2S is a polar covalent compound because the electronegitvity of Li is 1.00 and of S is 2.5. Thus the difference is 1.5 and that makes it polar covalent.
The shape is trigonal bipyramidal and all the atoms on the outside are the same so the charges cancel eachother. Nonpolar