Question

the atomic number of an atom is18 and mass number is 40 find the number of protons, neutron and electrons​

Answer 1

Answer:

here's your answer

Explanation:

ATOMIC NUMBER = electrons & protons

therefore, the number of electrons are- 18

no of protones are - 18

no of neutrons = mass no - atomic no

therefore, 40-18

=22

so number of neutrons are 22