Question

Question 40:
22. Without looking at the periodic table, select the elements of IIIA
group of the periodic table (atomic numbers are given)
3, 11, 19, 37
b) 5, 13, 21, 39
c) 7, 15, 31, 49
d) 5, 13, 31, 49​

Answer 1

Explanation:

option b is my answer

III A group elements belongs to boron family