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Từ điển Oxford Advanced Learner 8th
electron


elec·tron [electron electrons] BrE [ɪˈlektrɒn] NAmE [ɪˈlektrɑːn] noun (physics)
a very small piece of matter (= a substance) with a negative electric charge, found in all atoms
see also neutron, ↑proton

Word Origin:
late 19th cent.: from ↑electric + -on.

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