When a Substance Decays by Alpha Radiation,the Mass Number of the Nucleus

question 116

Multiple Choice

When a substance decays by alpha radiation,the mass number of the nucleus ________ and the atomic number ________.

• A)increases by 4,increases by 2
• B)reduces by 4,reduces by 2
• C)increases by 2,increases by 4
• D)reduces by 2,reduces by 4

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