Based on the location of nitrogen (N) on the periodic table, how many additional electrons does a nitrogen atom need in its valence shell to satisfy the octet rule when it forms bonds? one
three
five
eight

Three

Explanation:

Nitrogen is present in group 5A.

The atomic number of nitrogen is 7.

Its atomic mass is 14 amu.

It has 5 valence electron.

Electronic configuration:

N₇ = 1s² 2s² 2p³

we can see there are five electron in outer most shell. Thus, nitrogen needs three more electrons to complete the octet.

When it combine with other atoms it gain three electron from them. Consider the example of ammonia (NH₃) when nitrogen react with hydrogen it gain three electrons thus three atoms of hydrogen combine with one atom of ammonia because one hydrogen atom can share only one electron.