Question

plz answer my question​

Answer 1

1) E and F have same group because no. Of electron are same.

2) A element are more stable due to complete filled electron in k=2( like helium noble gas)

3) B is trivalent because it lose 3 electron and gives +3 valancy

4) C has highest no. Of valance electron 7e-

Hope u mate godd luck

Answer 2

a)E and F (same no. Of valence electrons)

b)A because it is fulfilled shell. It needs not to react.

c) B It is boron

d) C (7)