Question

nestions
1. Name the three sub-atomic
particles of an atom.
2. Helium atom has an atomic mass
of 4 u and two protons in its
nucleus. How many neutrons
does it have?


any one who will give the correct answer i will mark him or her brainliest​

Answer 1

Explanation:

1. protons, electrons and neutrons

2.helium have 2 neutrons

Answer 2

Answer:

1) The three sub-atomic particles of an atom are electrons, protons and neutrons.

2) It has 2 neutrons because the atomic mass is the addition of total number of protons and neutrons

So, 4 - 2 = 2