Question

7. These people are not concerned with the health of other people. The first element in every group
o representatwe elements shows properties datterent from the characteristic properties of the
group
a) Name three such elements
[b]Give two abnormal properties of each one of them.
​

Answer 1

Answer:

a) The elements which show abnormal behaviour are lithium , beryllium and carbon (represntative elements means elements of s and p block)

The abnormal behavior of lothium includes :

Reaction with nitrogen to from Li3N

On decomposition of its nitrate it gives an oxide...whereas other elements nano3 gives nano2 + o2

Abnormal behavior of beryllium includes :

High melting and boiling point

Formation of covalent bonds

Abnormal behavior of carbon includes :

Catenation

High melting and boiling point

Explanation: hope it helps you...please mark as brainliest