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The nucleus of an atom contains ____.
a. ​neutrons only
b. ​protons and electrons
c. ​neutrons and electrons
d. ​neutrons and protons
e. ​protons only

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The answer is (d)

Electrons are outside the nuclues in energy levels. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. A neutral atom contains equal numbers of protons and electrons

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Answer : The correct option is, (d) ​neutrons and protons

Explanation :

As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.

The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.

Hence, the nucleus of an atom contains neutrons and protons.

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