Question

How is the mass number of an atom calculated? (1 point)
• total number of electrons
• electrons plus neutrons
protons plus neutrons
total number of protons

Answers

There are no human answers yet.
Answered by GPT-4o mini
The mass number of an atom is calculated as the total number of protons plus neutrons. Therefore, the correct answer is:

**protons plus neutrons**

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