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1. What is contained in the nucleus of an atom?
A. Protons only
B. Electrons only
C. Electrons and Protons
D. Protons and Neutrons

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Answer:

Your answer is

D. Protons and Neutrons

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Answer:

Protons and neutrons

Explanation:

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  • Protons are positively charged particles
  • Neutrons are neutral charged particles
  • Electrons are negatively charged particles.

Mass number of a element=No of protons+No of neutrons

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