The mass number of an element is NOT changed when it emits ........

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The mass number of an element is NOT changed when it emits

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CAPF 2017 Paper-1

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Alpha and Beta radiations only

Alpha and Gamma radiations only

Beta and Gamma radiations only

Alpha, Beta and Gamma radiations

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Explanation:

Normal elements with At.No. more than 88, naturally disintegrate, decay into stable configuration by emitting alpha, beta (_) and gamma rays. Alpha is +vely charged and has has of this configuration atomic weight 4, and at,no 2 that is of He nucleus, . Beta- is electrons and -vely charged. Gamma is a photon with energy and no mass.