Question

Find out atomic number, mass number
number of electron

and neutron is an

element ?
40 Х
20​

Answer 1

Find out atomic number mass number number of electron and neutron in an element

To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number:

1. number of protons = atomic number.
2. number of electrons = atomic number.
3. number of neutrons = mass number - atomic number.