question 3\n____ is defined as the number of protons plus the number of neutrons\natomic number\nnuclear…

question 3\n____ is defined as the number of protons plus the number of neutrons\natomic number\nnuclear number\nionic number\nisotopic number\nmass number

question 3\n____ is defined as the number of protons plus the number of neutrons\natomic number\nnuclear number\nionic number\nisotopic number\nmass number

Answer

Brief Explanations:

The mass number of an atom is calculated by adding the number of protons and neutrons in its nucleus. The atomic number is just the number of protons. Other terms like nuclear number, ionic number, isotopic number are not standard terms for this sum.

Answer:

E. Mass number