Answer:

1. Electron Orbit
2. Neutron
3. Electron
4. Nucleus
5. Proton

Explanation:

1. An electron orbit is the path of an electron around the nucleus of an atom.
2. Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen.
3. An electron is a subatomic particle, symbol e⁻ or β⁻ , whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.
4. The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
5. A proton is a subatomic particle, symbol p or p⁺ , with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron. Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to as "nucleons".

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