Among and Between
We use among to indicate something is shared or distributed by people or groups. It is often used when there are three or more participants.
The apples were shared among the children.There was a group of children, each child received some of the apples.
We use between to indicate something is shared by two participants, or to indicate a reciprocal relationship.
The two sisters shared the apples between themselves.Each sister received some of the apples.
There were many arguments between the members of the council.The members of the council argued a lot. This was reciprocal.