When two nitrogen atoms bond together in n2, what type of
covalent bond do they form?

a) a double bond, because they overlap orbitals to share two electrons.

b) a double bond, because they overlap orbitals to share two pairs of
electrons.

c) a triple bond, because they overlap orbitals to share three electrons.

d) a triple bond, because they overlap orbitals to share three pairs of
electrons.

will vote !

The correct answer is D). See the explanation below, please.

Explanation:

The nitrogen atom requires 3 electrons to complete its octet, which can form a triple bond with another nitrogen atom (they form a covalent bond of the apolar type, where you share 3 pairs of electrons and both elements have equal electronegativity)

Option( D)

A triple bond, because they overlap orbitals to share three pair of electrons

Explanation:

Nitrogen as we know have 5 valence electrons (atomic number=7), hence to make a  noble gas with stable configuration we have provide it with 3 electrons. Furthermore, a covalent bond is formed when two similar atoms of non metals combine with each other to sustain into a molecule hence a total of 3 electrons are shared from each of the nitrogen atom making it chemically stable.

Since nitrogen atom combines with other nitrogen atom sharing 3 electrons each from the atom thus a triple covalent bond formed by the overlapping of electrons.

Dalton's Theory:
1. all elements is composed of very small particles called atoms 
2. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and properties. 
3. atoms cannot be divided, created, or destroyed
4. Atoms of different elements combine in simple whole number ratios to form chemical compounds 
5. In chemical reactions, atoms are combined, separated, or rearranged.
So as we can see; the first two sentences are correct while the third sentence not supported in the theory