A certain nucleus has a mass number 20 and atomic number 9. Find the n

1.	A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Answer» (i) Number of neutrons = Mass number – Atomic number = 20 – 9 = 11 (ii) Number of protons = Atomic number = 9.

A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.

Answer»

(i) Number of neutrons = Mass number – Atomic number

= 20 – 9 = 11

(ii) Number of protons = Atomic number = 9.