Question
The nucleus shown undergoes beta-minus decay.
53 ^ 131 I
How many protons will the nucleus have after it decays?
(1 point)
Ο 132
Ο 130
Ο 54
Ο 52
53 ^ 131 I
How many protons will the nucleus have after it decays?
(1 point)
Ο 132
Ο 130
Ο 54
Ο 52
Answers
Answered by
GPT-4o mini
In beta-minus decay, a neutron in the nucleus is converted into a proton and an electron (the beta particle) is emitted.
For the isotope you have provided, \( ^{131}_{53}I \) (Iodine-131):
- It has 53 protons (this is the atomic number).
- When it undergoes beta-minus decay, it will convert one neutron into a proton.
After the decay:
- The number of protons will increase by 1, so it will have \( 53 + 1 = 54 \) protons.
- The mass number (131) remains the same because a neutron is simply converted to a proton.
Therefore, after the decay, the nucleus will have **54 protons**.
The correct answer is: **54**.
For the isotope you have provided, \( ^{131}_{53}I \) (Iodine-131):
- It has 53 protons (this is the atomic number).
- When it undergoes beta-minus decay, it will convert one neutron into a proton.
After the decay:
- The number of protons will increase by 1, so it will have \( 53 + 1 = 54 \) protons.
- The mass number (131) remains the same because a neutron is simply converted to a proton.
Therefore, after the decay, the nucleus will have **54 protons**.
The correct answer is: **54**.
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