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18/09/2020 7:25 pm
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The elements with atomic numbers 101 and 104 belong to, respectively:
(1) Actinoids and Group 4
(2) Group 11 and Group 4
(3) Group 6 and Actinoids
(4) Actinoids and Group 6
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18/09/2020 7:29 pm
(1) Actinoids and Group 4
Explanation:
89Ac → 103Lr
Belongs to actinoids series and they all belongs to 3rd group. So atomic no. 101 element is actinoids and atomic number 104 element belongs to 4th group.