Question

help me it is urgent

Answer 1

1."A" will have the highest atomic no. coz while going from left to right in a period the atomic radius decreases

so, highest atomic no. will have lowest atomic radius

and in this table A is having the smallest atomic radius.

2."C" will have the lowest atomic no. because it has the largest atomic radius and element which has largest atomic radius will have lowest atomic no.

hope it helps....

Answer 2

In a period, the element having larger atomic radii will have lesser atomic no... since size decreases on going left to right

So highest atomic no. will be the one having lesser radius... i.e. 1.31 and other ques vice versa