Home NCERT Solutions NCERT Exemplar CBSE Sample Papers NCERT Books Class 12 Class 10
Question 2

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

Answer

Atomic mass of Helium = 4u
Atomic mass of an atom = no. of protons + no. of neutrons
4 = 2 + no. of neutrons
no. of neutrons = 4 - 2 = 2
Helium has 2 neutrons.

Popular Questions of Class 9 Science

Recently Viewed Questions of Class 9 Science

Write a Comment: