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An isotope of `._(90)Th^(231)` can be converted into `._(90)Th^(227)` by the emission of

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An isotope of `._(90)Th^(231)` can be converted into `._(90)Th^(227)` by the emission of
A. one `alpha`-particle
B. one `beta`-particle
C. two `alpha` and one `beta`-particle
D. one `alpha` and `2 beta`- particles
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Correct Answer - d
Isotopes of an element can be obtained by emitting one `alpha`- and `2beta`- particles from its nucleus
`._(90)Th^(231) overset(-alpha)(to) ._(88)Ra^(227) overset(-beta)(to) ._(89)Ac^(227) overset(-beta)(to) ._(90)Th^(227)`
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