Multiple choice general knowledge science & technology

The sum of protons and neutrons in an atom is:

  1. It's atomic number

  2. It's atomic mass

  3. A big number

  4. It's P/N factor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sum of protons and neutrons in an atom's nucleus is called the atomic mass number or mass number. This number represents approximately the atom's total mass since protons and neutrons each have about 1 atomic mass unit. Atomic number refers only to protons, while P/N factor and 'big number' are not scientific terms.

Keep practicing — related questions