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The symbol of neutron is represented by:

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Important Questions on Inside the Atom
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(a) Electronic configuration
(b) Number of protons
(c) Atomic number
(d) Valency
(e) Nature whether metal or non-mental
(f) Name.

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What is mass number of an element? How is the mass number related to the protons and neutrons present in the nucleus of an atom? Is it same as atomic number?

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