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Helium has 2 protons and electrons in its structure. The total number of neutrons in the nucleus of an atom is called the neutron number. Typical isotopes of helium are helium-4 and helium-3.
Helium is composed of two electrons in atomic orbitals surrounding a nucleus containing two protons and (usually) two neutrons.
A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with two neutrons, depending on the isotope, held together by the strong force.
Alpha decay, one type of radioactive decay, produces particles called alpha particles. An alpha particle can become a helium atom once it captures two electrons from its surroundings. This newly formed helium can eventually work its way to the atmosphere through cracks in the crust.
Helium is the 2nd element in the periodic table and has a symbol of He and atomic number of 2. It has an atomic weight of 4.00260 and a mass number of 4. Helium has two protons and two neutrons in its nucleus, and two electrons in one shell.
23 Αυγ 2022 · For example, the mass of a helium atom is 4.00260 amu, while the mass of the protons, neutrons, and electrons in the atom add up to 4.03298 amu. In other words, a helium atom is missing about 0.8% of the mass of its parts. Mass deficit is another name for mass defect.
