Question

answer my both questions please please please please please please........ I am waiting from 100 years

Answer 1

1. E will form only covalent compound
2. D element is metal with valency 2 as for metals group no. determines its valency
3.B is the non metal with valency 3.
4. D has larger atomic radius as while moving from left to right in the period the size decreases due to increase in no. of electrons in the outermost shell which increases the nuclear force of attraction between the electrons and nucleus..
5. Noble gases or inert gases...
6. D is magnesium
E.C
K L M
2 8 2

Answer 2

9 - 1-E
2-D
3-B
4-E has bigger atomic radius because atomic radius decreases while moving from left to right in a period
5- Inert gases
6-it is magnesium
electronic configuration=2,8,2

OR

1-1,17
2- second period elements are lithium and fluorine
Li=2,1
F=2,7

hope it helps you