1 jan 1897 ano - Ernest Rutherford

Descrição:

A physicist originally from New Zealand but working in Canada, investigates Becquerel's "uranic rays" and discovers that they are in fact a mixture of two components: a very heavy component which is easily absorbed by matter and has a positive charge; and a much lighter, more penetrating component which is not so easily absorbed and has a negative charge. Rutherford calls these components a and b, after the first two letters of the Greek alphabet.

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