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Question
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
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Solution
\[\ce{^\underline{238}_\underline{92}X -> ^\underline{234}_\underline{90}Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
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