Question

Mass no of calcium is 4o. lf it contains 20 neutrons
then how many electron will be dispositive calcium
ion. Also find atomic number of calcium ion​

Answer 1

Answer: Atomic number is 20.

Explanation:

Mass Number = Proton number + Neutron number

Here, Neutron number is 20 and mass number is 40. So, proton number is 40-20= 20. Therefore electron number is also 20.