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How many `alpha`-particles are emitted in the nuclear transformation: `._(84)Po^(215) rarr ._(82)Pb^(211) + ? ._(2)He^(4)` |
Answer» Correct Answer - B Let `x alpha`-particles are emitted. `._(84)Po^(215) rarr ._(82)Pb^(211) + x ._(2)He^(4)` Equating atomic mass of the both sides `215 = 211 + 4x` `:. X = (215 - 211)/(4) = (4)/(4) = 1` Therefore, one `alpha`-particle is emitted. |
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