What is the definition of a mass number out of these answers:
- It is the number of protons and electrons in an atom
- It is the number of protons in an atom
- It is the number of protons and neutrons in an atom
- It is the number of neutrons and electrons in an atom
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It is the number of protons and neutrons present in the nucleus of an atom of an element.
lillyraven3:
thanks, my science teacher gave me yr8 homework (even though i am in yr7), it really helps
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Mass Number=> It is the number of protons and neutrons in an atom.
Thank you for your answer. It really helps
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