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electron capture


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1 The formation of a negative ion by an atom or molecule when it acquires an extra free electron.

2 A radioactive transformation in which a nucleus acquires an electron from an inner orbit of the atom, thereby transforming, initially, into a nucleus with the same mass number but an atomic number one less than that of the original nucleus (capture of the electron transforms a proton into a neutron). This type of capture is accompanied by emission of an X-ray photon or Auger electron as the vacancy in the inner orbit is filled by an outer electron.

Subjects: Chemistry — Earth Sciences and Geography.


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