Question

Calculate: Mass number and number of electrons​

Answer 1

Answer:

The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom. To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.

Answer 2

Answer:

number of protons = atomic number

number of electrons = atomic numbers