Electrons
Electrons
Electrons (/ɪˈlɛktrɒn/) are subatomic particles that carry a negative electric charge. They are one of the fundamental particles that make up atoms, along with protons and neutrons.
Etymology
The term "electron" comes from the Greek word "ēlektron", which means amber. The electron was first identified as a separate physical entity during the study of cathode rays by J.J. Thomson in 1897.
Properties
Electrons have a negative electric charge and are located in the electron shell of an atom. They play a key role in physical phenomena such as electricity, magnetism, chemistry, and thermal conductivity. Electrons also have properties of both particles and waves, which is known as wave-particle duality.
Related Terms
- Atom: The smallest unit of a chemical element, consisting of protons, neutrons, and electrons.
- Proton: A subatomic particle with a positive electric charge, found in the nucleus of an atom.
- Neutron: A subatomic particle with no electric charge, also found in the nucleus of an atom.
- Electron shell: The path or orbit electrons follow around the nucleus of an atom.
- Wave-particle duality: The concept in quantum mechanics that all particles also have properties of waves.
External links
- Medical encyclopedia article on Electrons
- Wikipedia's article - Electrons
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