Class 7 Science MCQs (Grade 7) From Textbook
Free Atoms and Atom Model MCQs App | Class 7 Science e-Book PDF Download
Class 7 Science MCQs – Practice Test 33 (Chapter 1)
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'Radioisotopes' are used to trace
The number of proton in an 'atom' is also known as
The symbol of "oxygen" is
The valency of 'bromine' is
Electrons are shared in
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