This is a test of commonsense. Complete the next sentence:

How to study the chemical reactivity of organic amines 
Learn what amines are. 
Amines are organic hydrocarbons that are attached to nitrogen in a single bond manner. Amines are very reactive group of compounds.
This is so due to the existence of the electron lone pair on the nitrogen atom. The nitrogen atom in amines is relatively of low electro-negativity if we compare it with oxygen.