2
Helium has two neutrons and two protons in its nucleus.
He-4 isotope has 2 neutrons.
2 protons 3 neutrons
Yes Helium has two protons and two electrons in its nucleus.
The nucleus of a helium atom contains two protons and two neutrons.
Each nucleus of helium-3 contains one neutron.
There are several isotopes of Helium and they have different numbers of neutrons. The simplest and most common is Helium-4 which has two neutrons
The hydrogen nucleus has a single proton. The helium nucleus has two protons and one or two neutrons.
The helium nucleus is larger than the proton. The He nucleus consists of two protons, and one (rarely) or two (most commonly) neutrons. (These are He-3 and He-4, respectively.) That would make the helium nucleus a multiple of three or four times the mass of that of a single proton.
2 protons and 2 neutron
When helium capture occurs with a carbon-12 nucleus, the result is oxygen-16. This is because the combination of a helium nucleus (2 protons and 2 neutrons) with a carbon-12 nucleus (6 protons and 6 neutrons) produces an oxygen-16 nucleus (8 protons and 8 neutrons).
A hydrogen atom has 1 proton in its nucleus. Since the helium-4 atom has twice as many protons as hydrogen, it has 2 protons. Helium-4 also has 2 neutrons, hence the name "4" representing the total number of protons and neutrons.