Question

Elements A,B and C have atomic no. 9 , 10 and 20 respectively.
State which one is
1) metal
2) non metal
3) chemically inert
Also explain the formation of bond between any two elements fro above question . Name the type of bond​

Answer 1

Answer:

1. C is metal
2. A is non metal
3. B is chemically inert

Answer 2

Answer:

C is an alkali metal with atomic number a+2. Hence, B with the atomic number a+1 must be an inert gas. Because on moving towards right of the periodic table from alkali metals family i.e. from s-block elements we reach at inert gas family series that is at 18

th

group.

Thus, the element A with the atomic number a must be an element belonging to the halogen group, because it comes before inert gas group.

Since halogens are non-metal and with alkali metals they will form ionic bonding.