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Class 7 Science Study Material: Practice Test 7 (Chapter 2)
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The Atoms molecules and ions Quiz Questions and Answers PDF (Atoms Molecules and Ions Quiz PDF e-Book) download Ch. 2-7 to learn Class 7 Science Course. Solve Chemical Formulae of Molecular Element and Compound MCQs PDF, Atoms Molecules and Ions Quiz Questions and Answers to learn online classes courses. The Class 7 Science Quiz App Download: Free Atoms Molecules and Ions App to learn chemical formulae of molecular element and compound, what is atom, what is molecule, what is ion test prep for distance education.
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In nucleus, mass of an atom is more than
A theory of movement of electrons in a fixed orbit around nucleus was given by
Two or more atoms chemically combined together form a
An electrically charged particle which is formed when an atom gains or loses electron is called
The number and types of atoms a molecule contain, are shown by its
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