The mass number of an atom is the sum of number of:

protons and electrons

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protons and nucleons

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protons and neutrons

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electrons and nucleons

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Solution

The correct option is C protons and neutrons
The sum of number of protons and neutrons in the nucleus of an atom of an element is called its mass number. Mass number is denoted by A.

Mass number (A) = number of protons + number of electrons

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Similar questions

(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.

(b) What is the relation between the atomic number and mass number of an element?

Atomic mass of an element is the sum of number of ____________ and ___________.

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