Class 7 Science MCQs - Chapter 3
Atoms Molecules and Ions Multiple Choice Questions (MCQ) PDF - 6
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Atoms Molecules and Ions Questions & Answers PDF Download: MCQ Quiz 6
MCQ 26: The diameter of a 'nucleus' is
- 0.00001nm
- 1nm
- 0.1nm
- 0.01nm
MCQ 27: The total number of protons in atom of each element is called its
- atomic number
- atomic mass
- molecular mass
- atomic scale
MCQ 28: The smallest particle of an atom which exists, is called
- matter
- atom
- proton
- electron
MCQ 29: The nucleus in an atom consists of
- protons
- neutrons
- electrons
- both a and b
MCQ 30: Molecules which contain fixed number of same type of atoms are molecules or
- elements
- compounds
- mixtures
- all of them
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