Answer – The subatomic particles found in the nucleus of an atom are protons and neutrons.

Explanation:

An atom is the most fundamental unit of matter. The word is, in fact, derived from the Greek word atomos, which means indivisible. While it was initially thought to be the smallest known unit that could not be broken up further, it was later discovered to be composed of 3 subatomic particles – particles that are smaller in size than the atom itself.

The atom contains a central nucleus with two types of subatomic particles – the positively charged protons and the neutrally charged neutrons. Both protons and neutrons are densely packed in the nucleus and contribute to most of the mass of the atom. They are together also referred to as nucleons. 

Further, because neutrons have a neutral charge, the nucleus as a whole takes on the positive charge of the protons. It is also because of this that the nucleus draws toward it another type of subatomic particle called electrons. These are negatively charged particles with negligible mass that are located outside the nucleus. 

Although the atom contains subatomic particles with varying electric charges, it is neutrally charged as a whole because the positive charge of the protons gets canceled out by the negative charge of the electrons.

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