The mass number of an element can be easily approximated by adding together the number of __________ in an atom of that element.

The mass number of an element can be easily approximated by adding together the number of __________ in an atom of that element.

Naim 02:19

The mass number of an element can be easily approximated by adding together the number of __________ in an atom of that element.





  1. protons and neutrons
  2. energy levels
  3. isotopes
  4. protons and electrons
  5. neutrons and electrons



Answer: 1


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