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CBSE Class 9 Answered

Alpha particles contains helium ions or atoms or nucleus?if it contains helium nuclei then how this alpha particles discovered before the discovery of nucleus by rutherford?
Asked by abinash.gupta003 | 10 Mar, 2017, 11:25: AM
answered-by-expert Expert Answer
In 1899, Rutherford had discovered alpha and beta rays from uranium. Today we know that they are not rays, they are particles; alpha is a nucleus of helium and beta is an electron.
Answered by Arvind Diwale | 10 Mar, 2017, 12:09: PM
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