Atomic numbers of few elements are given below. Which of the pairs belongs to s -block?
Chemistry · Class 11 · CBSE — Classification of Elements and Periodicity in Properties
Atomic numbers of few elements are given below. Which of the pairs belongs to s-block?
- 7, 14
- 3, 20
- 8, 15
- 9, 17
Answer
(B) 3, 20
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