Question

In the following table , the position of six elements A , B , C , D , E and F are given as

they are in the modern periodic table as follows :

Group

Period

1 2 3 to 12 13 14 15 16 17 18

2 A C D

3 B E F



On the basis of the above table answer the following questions below :

a. Name the Non – metal with the valency of 3

b. Out of B and C , whose atomic size is bigger and why

c. Write the common name for the family to which the elements D and F belongs to​

Answer 1

Answer:

a : non metal is B {aluminum} having valency 3 . aluminum should be metal but shows some property of non metal

b: B should have larger sizes as

1. due to addition of p orbital

2. as we move from left to right along period the size decrease due to increase in nuclear charge .

c: noble gases