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Q. Match the Column I with Column II and select the correct option.
Column I (Atomic no.) Column II (Position in periodic table)
(A) 52 (1) $s-$ block
(B) 56 (2) $p-$ block
(C) 57 (3) $d- $ block
(D) 60 (4) $f-$ block

Classification of Elements and Periodicity in Properties

Solution:

Atomic number E.C. Block
(A) 52 $[ Kr ] 5 s^{2} 4 d^{10} 5 p^{4}$ $p-$ block $ (2)$
(B) 56 $ [Xe] 6 s^{2}$ $s-$ block $(1)$
(C) 57 $[ Xe ] 6 s^{2} 5 d^{1}$ $d-$ block $(3)$
(D) 60 $[ Xe ] 6 s^{2} 4 f^{4}$ $f-$ block $(4)$