In a given reaction, ^ A _ Z X arrow ^ A _ Z+1 Y arrow ^ A-4 _ Z-1 K arrow ^ A-4 _ Z-1 K the radioactive radiations are emitted in the sequence of

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Correct answer: C. β,\ α,\ γ

In the first step, ^ A _ Z X arrow ^ A _ Z+1 Y , the mass number remains unchanged while the atomic number increases by 1 . This indicates the emission of a β particle. In the second step, ^ A _ Z+1 Y arrow ^ A-4 _ Z-1 K , the mass number decreases by 4 and the atomic number decreases by 2 . This indicates the emission of an α particle. In the third step, ^ A-4 _ Z-1 K arrow ^ A-4 _ Z-1 K , both the mass number and the atomic number remain unchanged, which corresponds to the emission of a γ ray. The sequence of emitted radioactive radiations is β, α, γ . Answer: β,\ α,\ γ

In a given reaction, ^ A _ Z X arrow ^ A _ Z+1 Y arrow ^ A-4 _ Z-1...

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