Electron shell
Electron Shell
The Electron Shell (pronunciation: /ɪˈlɛktrɒn ʃɛl/), also known as an energy level, is a model describing the distribution of electrons in an atom's hypothetical spherical shell. The term "shell" comes from the atomic theory by Niels Bohr, who described the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus, similar to planets revolving around the sun.
Etymology
The term "Electron Shell" is derived from the early atomic models where electrons were pictured as orbiting the nucleus in layered shells. The word "electron" comes from the Greek word 'ēlektron', meaning 'amber', from which the phenomenon of electricity was first derived. The term "shell" comes from the Latin 'shell', meaning 'husk' or 'peel'.
Related Terms
- Atomic orbital: A mathematical function that describes the wave-like behavior of an electron in an atom.
- Quantum number: A number that describes the properties of electrons in atoms, such as their energy levels (shells).
- Periodic table: A tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties.
- Valence electron: The electrons in the outermost shell of an atom that are involved in forming chemical bonds with other atoms.
See Also
External links
- Medical encyclopedia article on Electron shell
- Wikipedia's article - Electron shell
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