Class 9 Chemistry Certification MCQs – Practice Test 3 (Chapter 7)

Structure of Atoms Quiz with Answers PDF – Test 3

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Structure of Atoms Quiz PDF Download – Test 3

MCQ 11: The lowest energy orbital among the following is:

MCQ 12: When Uranium-238 emits α particles it decays in to:

Helium
Carbon
Thorium-234
Uranium-235

MCQ 13: D sub-shell can accommodate maximum:

2 electrons
10 electrons
14 electrons
6 electrons

MCQ 14: Chlorine-35 exists in nature about:

0.35
0.4
0.5
0.75

MCQ 15: Protium has:

one neutron
two neutrons
no neutron
3 neutrons

Class 9 Chemistry Quiz App & e-Book – Structure of Atoms Certification Guide

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