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

Question 158

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 1,increases by 4
D) reduces by 3,reduces by 1

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