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20/09/2020 6:34 pm
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The set that contains atomic numbers of only transition elements, is :
(1) 37, 42, 50, 64
(2) 21, 32, 53, 64
(3) 21, 25, 42, 72
(4) 9, 17, 34, 38
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20/09/2020 6:35 pm
(3) 21, 25, 42, 72
Explanation:
A transition element is defined as the one which has incompletely filled d orbitals in its ground state or in any one of the oxidation state.
Zn(z = 30), Cd(z = 48), Hg(z = 80) are not transition element.