When a beta particle is emitted from the nucleus the nucleus has one more proton and one less neutron. This means the atomic mass number remains unchanged and the atomic number increases by 1.
Best answer :
b. the number of electrons in the atom increases by one as the beta particle leaves the nucleus and joins the valence electrons

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3 years ago

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The isotope tritium has a half-life of 12. 3 y. Assume we have 11 kg of the substance. How much tritium will be left after 51 y?

Mama L [17]

Half-life is a time in which the concentration of the substance gets reduced to 50% of the initial concentration. The number of tritium that will be left after 51 years is 0.624 kg.

<h3>What is an isotope?</h3>

Isotopes are chemical substances that have the same atomic number but different atomic mass because they have a different number of neutrons in the nuclei.

The half-life of the isotope, tritium is 12.3 years. Assuming we have 11 kg of substance and a number of years 51 years.

$11 \times 2 ^{\frac{-51}{12.3}} = 0.6239 \;\rm kg$

Therefore, the number of tritium that will be left after 51 years is 0.624 kg.

Learn more about half-life here:

brainly.com/question/17018072

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2 years ago

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Sergeeva-Olga [200]

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3 years ago