MCQOPTIONS
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| 1. |
Atomic mass is equal to |
| A. | number of electrons of an atom |
| B. | sum of the numbers of electrons and protons of an atom |
| C. | sum of the numbers of neutrons and protons of an atom |
| D. | none of these |
| Answer» C. sum of the numbers of neutrons and protons of an atom | |