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electron

electron

100 3.7
A very small particle in atoms that has a negative electric charge and carries electricity
  • noun
  • /ɪˈlɛktrɒn/
  • Specialized
translation icon : electrón
  • Electrons are essential for conducting electricity, as they carry the charge through the electron circuit.
  • electrons in atoms
  • electron charge
  • electrons and protons

We learned in physics that every electron is identical.

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Examples

  • In an atom, each electron has a negative charge and orbits the nucleus.

  • A continuous supply of high-energy electrons was required, but none could be identified.

    Academic text (1990)
  • We learned in physics that every electron is identical.

  • We're building a machine to accelerate electrons.

  • When a substance or material has extra electrons, it is said to be negatively charged.

    Academic text (2011)
  • Silicon atoms have only four electrons in their outer shells.

    Academic text (2011)
  • Phosphorus has one extra electron in its outer shell that is not needed to bond with other atoms.

    Academic text (2011)
  • When heated, some materials can lose their electrons, allowing electricity to flow easily.

Synonyms

negatron
vselectron
  • Archaic
9.4

A very small particle with a negative electric charge that is part of atoms

adds that it is found in atoms and carries electricity in solids

Compounds

electron microscope
  • Specialized
6 4.3

A machine that uses electrons instead of light to make very large images of tiny things

electron accelerator
  • Specialized
2 6.8

A machine that makes tiny particles inside atoms move very fast for experiments or medical treatment

electron beam
  • Specialized
1 4.6

A focused stream of tiny charged particles used to make images in special microscopes

electron microscopy
  • Specialized
1 4.7

A way of using a microscope and electrons to make very large pictures of small things like cells and viruses

electron volt
  • Specialized
1 5.6

A unit that measures very small energy for atoms and particles

electron gun
  • Specialized
1 6.3

A device that makes and focuses a thin beam of electrons in a television or microscope

free electron
  • Specialized
1 4.9

An electron not attached to an atom that can move freely and carry electricity

electron shell
  • Specialized
1 4.8

A group of electrons that surround an atom's centre at the same energy level

valence electron
  • Specialized
1 6.5

A tiny particle in the outer part of an atom that can join with other atoms

electron lens
  • Specialized
7.4

A device that uses electric or magnetic fields to focus a beam of electrons

electron microscopic
  • Specialized
6.5

Visible only with a very powerful microscope, not with light

electron multiplier
  • Specialized
8.6

A device that makes a weak electric signal stronger by producing more electrons

electron optics
  • Specialized
7.2

The study of how electric and magnetic fields control electron beams

electron orbit
  • Specialized
5.5

The path an electron takes around the center of an atom

A method that uses microwaves to study how substances with unpaired electrons react to magnets

electron radiation
  • Specialized
6.7

A radioactive material sends out fast electrons during decay

7.3

A technique using microwaves to study magnetic behavior of electrons in certain materials

electron tube
  • Archaic
6.9

A glass or metal device that controls electric current in old radios and televisions

How Small

quark
  • Specialized
14 9.9
electron
  • Specialized
100 3.7
proton
  • Specialized
63 4.5
atom
  • Specialized
170 3.5
molecule
  • Specialized
209 3.4

Surface Forms

electron singular
electrons plural

Morphology

electron = electric (semi-transparent) = electr + on

The form links to 'electric'/'electricity' so learners can see a relation to electricity, but '-on' and the specific sense 'subatomic particle' are technical coinages using Greek combining forms and are not fully predictable for average learners.

Etymology

The word electron comes from the Greek word ēlektron, which means 'amber'. Long ago, people found that rubbing 'amber' made a small electric charge, and the word electric comes from the same root. So the tiny charged particles inside atoms were named electrons because they carry electric charge.