electron

noun
elec·tron | \i-ˈlek-ˌträn \

Definition of electron 

: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109 × 10−31 kilogram or about ¹/₁₈₃₆ that of a proton

Examples of electron in a Sentence

Recent Examples on the Web

Meanwhile, the hole can absorb electrons from water to form protons and oxygen. Charles W. Dunnill, Scientific American, "Method of Making Oxygen from Water in Zero Gravity Raises Hope for Long-Distance Space Travel," 10 July 2018 The energy of a photon gets absorbed by an electron in the material which then jumps, leaving behind a hole. Charles W. Dunnill, Scientific American, "Method of Making Oxygen from Water in Zero Gravity Raises Hope for Long-Distance Space Travel," 10 July 2018 The electrons on the outer orbit of the cobalt atom are paired up, which means it’s small, dense, and forms layers easily. Ellen Airhart, WIRED, "Alternatives to Cobalt, the Blood Diamond of Batteries," 7 June 2018 Graphene’s optical properties depend on the ability of its electrons to move freely around the atomic sheet. The Economist, "How to fool infrared vision gear into thinking you are not there," 5 July 2018 An atom’s nucleus and its electrons both have a slight magnetism that causes each component to slightly push and pull on the other. Sophia Chen, WIRED, "These Physicists Watched a Clock Tick for 14 Years Straight," 4 June 2018 To see back into the dark age before the first stars, astronomers look for a signal emitted when electrons in the primordial neutral hydrogen gas spontaneously flipped their orientation. Daniel Clery, Science | AAAS, "China’s moon mission will probe cosmic dark ages," 16 May 2018 The defects can take and store quantum information in the form of electrons for relatively long periods of time and link it efficiently to photons. Fox News, "Scientists are using diamonds to send secret messages," 6 July 2018 Still, making the most of the finite store of electrons will remain crucial to Formula E tactics. Jack Ewing, New York Times, "Racing Series Helps Show the Way to a Battery-Powered Future," 5 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'electron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of electron

1891, in the meaning defined above

History and Etymology for electron

electr- + -on entry 2

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Statistics for electron

Last Updated

7 Oct 2018

Look-up Popularity

Time Traveler for electron

The first known use of electron was in 1891

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More Definitions for electron

electron

noun

English Language Learners Definition of electron

physics : a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom

electron

noun
elec·tron | \i-ˈlek-ˌträn \

Kids Definition of electron

: a very small particle that has a negative charge of electricity and travels around the nucleus of an atom

electron

noun
elec·tron | \i-ˈlek-ˌträn \

Medical Definition of electron 

: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109534 × 10−28 gram or about ¹/₁₈₃₆ that of a proton

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