Question

Explain Rutherford-Soddy law.

Answer 1

Theory of Radioactivity Disintegration.

Rutherford and Soddy, in 1903, postulated that radioactivity is a nuclear phenomenon and all the radioactive changes are taking place in the nucleus of the atom. ... (1) The atomic nuclei of the radioactive elements are unstable and liable to disintegrate any moment.

According to this theory, radioactivity is an 'atomic' phenomenon, which is accompanied by 'chemical' changes. ... Prior to his discovery of the nucleus model of the atom (1911), Rutherford regarded alpha particles as ionized helium atoms......

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Answer 2

Rutherford and Soddy emphasized that the 'chemical' changes had their seat within the atom and not on the molecular level. Today radioactivity denotes the ability of certain nuclei to undergo transformations through the emanation or emission of radiation.

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