Radioactivity - Radioactive Such elements in the periodic...

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Radioactivity In 1896 , Henry Becquerel observed that the uranium salt was emitting a penetrating type of radiation spontaneously. A little later, Curie suggested that these radiations were from a uranium compound. He termed this an atomic phenomenon and named this Radioactivity . The phenomenon of spontaneously emitting active radiations from an unstable atomic nucleus is called radioactivity . The substances emitting such radiations are called
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Unformatted text preview: Radioactive . Such elements in the periodic table can be distinguished by their atomic weights given in parentheses. In 1905, Rutherford analyzed the radiations emitted by naturally occurring radioactive elements as three types depending on the effect of a magnetic or electric field on them. These radiations are named alpha ( α ? ), beta ( β ? ) and gama ( γ ? ) ....
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