Question

how many numbers of proton and neutron are there in an atom having a=40 and z=20 ?

please fast answer tomorrow is paper ‍​

Answer 1

Answer:

Number of proton = 20

Number of neutron = 20

Explanation:

atomic number(z) = 20

mass number(a)=40

To find: Number of protons, Number of neutrons

Number of proton = Atomic number = 20

Number of neutron = Mass Number - Number of Proton

Number of neutron = 40 - 20 = 20

Have a fantastic day!

:)

Answer 2

Answer:

This element is Calcium and its has 20 protons and 20 neutrons.

Explanation:

The atomic number (Z) is 20. The atomic number is the number of protons. The atomic mass = No. of protons + No. of neutrons

The atomic mass = A = 40

So,

40 = 20 + No. of neutrons

40 - 20 = No. of Neutrons

20 = No. of neutrons

I hope this helped you. If you liked the answer, it would be a great help if you marked me as the brainliest!