Nucleons are equal to?

Number of electrons in an atom

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Number of protons in the nucleus

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Number of neutrons in the nucleus

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Number of protons and neutrons in the nucleus

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Solution

The correct option is B Number of protons and neutrons in the nucleus
Nucleons are equal to number of protons and neutrons in the nucleus.
eg: If the given atom or isotope is ${H e}_{2}^{4}$ ${H e}_{Z}^{A}$
$Z = 2$ Number of protons
$A = 4$ Number of nucleons
$A - Z = 4 - 2 = 2$ Number of neutrons
Hence nucleons = number of [protons+neutrons]

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Select the sub-atomic particles that are present in the nucleus of an atom.

A. Electrons

B. Protons

C. Neutrons

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