Question

1) Which of the following is the correct order of atomic radius for li , Na and K?
(a) Na >li>k> (c)li>Na>k (b)k>Na>li (d)li>k>Na​

Answer 1

Answer:

C

Explanation:

As we move from top to bottom in group the atomic radius will be increased, because the in coming electron enters into a new sub shell.

 Li, Na, K, are IA group elements from Li to k the atomic radius will be increased. So the correct order of atomic radius is Li < Na < K.

Hence option C is correct.

Answer 2

Answer:

(b)k>Na>li

Radius increases down the group