The number of protons determines the element. So when neutrons are added, there is no change in the number of protons and helium atom is unchanged.
Adding a neutron increases the atom's mass by about 1 AMU assuming it remains stable.
Adding a neutron to an atom's nucleus increases the atom's mass by the mass of the neutron itself. Neutrons are more massive than protons, so adding a neutron will increase the atom's total mass without changing its charge.
Since a neutron has mass, adding a neutron to an atomic nucleus increases the atom's mass.
Adding a neutron increases the atom's mass by about 1 AMU assuming it remains stable.
The function of a neutron in an atom is to help stabilize the nucleus by balancing the positive charge of the protons and adding mass to the atom.
Since a neutron has mass, adding a neutron to an atomic nucleus increases the atom's mass.
The sun uses nuclear fusion to produce light and energy. the process is relatively complicated but simplified it looks something like this. step 1: hydrogen atom + hydrogen atom = deutrerium atom (an isotope of hydrogen (one extra neutron)) + positron + neutrino step 2: Deutrerium atom + hydrogen atom = helium 3 (an isotope of Helium (missing one neutron)) + energy step 3: helium 3 atom + helium 3 atom = helium atom + hydrogen atom + hydrogen atom + energy.
This isotope of helium is helium-3; the atomic number of helium is 2.
Neutrons have no charge, so in a helium atom, the neutron would also have no charge. Helium typically has two protons (+1 charge each) and two neutrons (no charge), resulting in a neutral overall charge.
The name helium tells that its atomic number is 2, containing 2 protons in each atom. The numerical part of the name shows that each atom also has one neutron.
Adding a neutron to an atom's nucleus increases the atom's mass because neutrons contribute to the atomic mass but have no charge. The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus, so adding a neutron increases the overall mass without affecting the atom's charge or chemical identity.
A helium atom typically has two neutrons. This gives helium a total of four particles in its nucleus (two protons and two neutrons), which contributes to its atomic mass of approximately 4 atomic mass units.