Question

answer Q4. 1) all 5 questions !​

Answer 1

1li
2be
3B
477
5N
6O
the period belongs from 2nd period

Answer 2

1.Li,Be,N,C,B,O.

2.2nd period.

3.Because period 2nd contain 2 shells in each elements which is similar to the above elements.

4.Biggest atom=Li, smallest atom=O

5.As we go from left to right , the atomic size get decreases and new electron is added to the element.