JEE Main 20204 SeptemberMorning Shift

Exam: JEE Main
Year: 2020
Date: 4 September
Shift: Morning Shift
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

JEE Main 2020 · 4 September · Morning Shift · Chemistry · Classification of Elements and Periodicity in Properties

The elements with atomic numbers 101 and 104 belong to,...

The elements with atomic numbers

101

and

104

belong to, respectively:

Options

AGroup $11$ and Group $4$
BActinoids and Group $6$
CActinoids and Group $4$
DGroup $6$ and Actinoids

Correct answer

C. Actinoids and Group $4$

Step-by-step solution

${}_{89}Ac{\to}_{103}Lr$

Belongs to actinoids series and they all belongs to ${3}^{rd}$ group. So atomic n o. $101$ element is actinoids and atomic number $104$ element belongs to ${4}^{th}$ group.

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