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A radioactive element .(Z)X^(4) whose at...

A radioactive element `._(Z)X^(4)` whose atomic mass is A and atomic number is Z emits an `alpha`-particle and `gamma`-rays. What is the atomic number and atomic mass of the newly formed (daughter) atom?

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An `alpha` particle consists of two protons and two neuctron but `gamma` rays. They are emitted by the nucleus of an element.
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