Helium atom
- 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 either one or two neutrons, depending on the isotope, held together by the strong force.
- A helium atom consists of a nucleus containing two positively charged protons and two neutrons, encircled by two orbiting electrons which carry a negative charge.
- The helium atoms in this model different from real helium atoms due to the difference is that the nucleus is 4.1 times heavier than normal.
Using the standard model of the helium atom, Z=2 ; that is there are 2 protons, 2 massive positively charged particles in the helium nucleus.
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