Answer: Helium has two protons, while hydrogen only has one.
Here’s a brief rundown on why the rest wouldn’t be right:
- Hydrogen has one neutron
Hydrogen actually has no neutron, a hydrogen atom contains one proton, one electron, and no neutrons.
- Helium has one neutron
Most helium atoms have two neutrons in it.
-Hydrogen has 2 protons, while Helium only has one
As stated, Hydrogen has one proton. Helium actually has 2 protons, electrons, and neutrons.
Hope this helps!
