Question

Which of the following set of atomic number
represents only representative elements?
(1) 55, 12, 48, 53
(2) 13, 23, 54, 83
(3)3, 33, 53, 87
(4) 22, 33, 55, 66

also suggest any quick trick to find out the answer .​

Answer 1

Answer:

3) 3,33,53,87

Explanation:

last electron enters in S and P orbitals representative elements