Pick out the alkane which differs from the other members of the group

Pick out the alkane which differes from the other members of the group : 2, 2-Dimethylpropane, Pentane, 3- Methybutane, 2,2 - Dimethylbutane

Mention some characteristics in which nitrogen differs form the other members of the group .

Write one physical characteristic of boron in which it differs from the other members of group-13.

The first element of a group in many ways differ from the other heavier members of the group. This is due to

Boron differs from the other members of group 13 because it :

List two important properties in which boron differs from the rest of the members of group. Mention the main reasons for the difference.

The chemistry of Boron is different from that of other members of the same group. Mention any two differences and give reason.