With what elements does nitrogen form ionic bonds?

Group 1 and 2 elements

Explanation:

Nitrogen, a non-metal will form ionic bonds with most group 1 and group 2 metals on the periodic table.

How does ionic bonds form?

They are bonds formed between a highly electronegative specie and one with very low electronegativity. As such, ionic bonds forms between metals and non-metals In this bond type, the metal due to its electropositive nature will transfer electrons to the non-metals for it to gain. The non-metals becomes negatively charged as the metal is positively charged. The electrostatic attraction between the two specie leads to the formation of ionic bonds.

Most metals in group 1 and 2 fits in this description. Some of them are calcium, magnesium, lithium, Barium e.t.c.

It mostly favors group 2 metals.

The correct answer is c

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"