Question

Charge and mass of the nucleus of helium atom are respectively

Answer 1

Answer:

No. of Protons + No. of Neutrons = (No. of electrons) = Mass number.

The mass number of He = 4

No.of Protons in He = 2

Using the formula,

No. of Protons + No. of Neutrons = Mass number.

No. of Neutrons = Mass number - No.of Protons

No. of Neutrons = 4-2 = 2

Therefore, No.of Neutrons in Helium atom = 2

Answer 2

Answer:

helium is represented as 2He4

Explanation:

charge of helium is 2e

mass of helium is 4

since it has 2electrons 2protons and 2 neutrons.

here mass = no. of protons + no. of neutrons.

hope it helps u