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Which of the following describes radioactive decay by beta particle emission?a. The daughter isotope has an atomic number two less than the parent and a mass number four less.b. The mass number of the daughter isotope is one more than the parent, and both isotopes have the same atomic number.c. The atomic number of the daughter isotope is one more than the parent; the mass numbers are the same.d. The daughter isotope has an atomic number one less than the parent and a mass number two less.

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Answer:

c. The atomic number of the daughter isotope is one more than the parent; the mass numbers are the same

Explanation:

Radioactive decay by beta particle emission involves the emission of an electron.

An electron is a very light particle and its emission does not reflect a loss in mass of the parent molecule. However, the atomic number of the parent molecule increase by one due to the retention of a proton.

Therefore, the daughter isotope has the same mass number as the parent molecule but its atomic number increases by one unit.

An example of beta particle emission is given below;

Th₀(234) ---> Pa₉₁(234) + e₋₁(0)

Thorium₉₀(234) emits a beta particle, e₋₁(0) to give Protactinium₉₁(234)

Answer:

c

Explanation:

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