First slide

Modern approach of classification of elements

Question

Which of the following sequence represents atomic number of only representative elements?

Moderate

A

55, 12,48,53
B

13, 33, 54, 83
C

3, 33, 53, 87
D

22,33, 55, 66

Solution

Representative elements are s and p-block elements except inert gases.
3 , 33, 53, 87 are representative elements'

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