what is the mass of an atom is constituted mainly by (a) neutron and neutrino(b) neutron & electron (c)neutron & proton (d)proton and electron
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2) The particles which can be added to the nucleus of an atom without changing its chemical properties are called [NCERT 1979]
A) Electrons
B) Protons
C) Neutrons
D) None of the above
A) Electrons
B) Protons
C) Neutrons
D) None of the above
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Answer:
c - neutron and proton
Explanation:
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