Question

Decompression sickness (also known as the bends) is a condition that affects divers and others operating under pressurized conditions. It occurs when gases such as nitrogen come out of solution in the blood. This can lead to symptoms including joint pain, shortness of breath and paralysis. Severe cases may result in death. What type of molecule (ionic, polar covalent, non polar covalent) is nitrogen gas?

Answer 1

Nitrogen gas has a molecular formula of N2 this suggests that there are 2 nitrogen atoms that are chemically bonded to each other.
Since both atoms are similar and have the same electronegativity, both atoms polarise the electron clouds of each other to a similar extent. This results in the formation of a non polar covalent bond.