Question

the atomic number of 3 elements A,B,C are 12,18,20 respectively. state giving reason which 2 elements will show similar properties.

Answer 1

the elements a,b,c are sodium , chlorine and pottasium respectively .
out of these , Na and K have the same properties as they fall into the same group , GROUP _ 1 .they are alkali metals , having their valency as 1
chlorine, is a non metal , so it does not have any similar properties

Answer 2

Answer:

element (a) is magnesium

(b) is argon

(c) is calcium

calcium and magnesium are metals it will show similar property