Question

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

Answer 1

☆$\red {HELLO\:DEAR}$☆

• Helium atom has two neutrons.

• The mass of an atom is the sum of the masses of protons and neutrons present in its nucleus.

• Since helium atom has two protons, mass contributed by the two protons is (2 × 1) u = 2 u.

• Then, the remaining mass (4 − 2) u = 2 u is contributed by 2u/1u = 2 neutrons.

☆$\green {VISHU\:PANDAT}$☆

☆$\blue {FOLLOW\:ME}$☆

Answer 2

Answer:

Two neutrons

Explanation: