What kind of chemical bond in compounds: MgO, CO, N2, NF, LiF, Mg?

Metal and non-metal – ionic bond
Metal – metal bond
Two identical non-metals – covalent non-polar bond
two different non-metals – covalent polar bond
All organic substances have a covalent polar bond
MgO – ionic bond (as metal and non-metal)
CO – covalent polar bond (since two different non-metals)
N2 – covalent non-polar bond (since two identical non-metals)
NF – covalent polar bond (since two different non-metals)
LiF – ionic bond (both metal and non-metal)
Mg – metallic bond (since it is a metal)



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