an atom contains 22 protons and 26 neutrons. what is its mass number?

The mass number of this atom is 48.

Quick Scoop

• The mass number of an atom is the total number of protons plus neutrons in its nucleus.

• Here, the atom has 22 protons and 26 neutrons.

• So, mass number === 22 +++ 26 === 48.

Final answer: 48

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