stressedadfff
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anyone know how to solve the following?
18 A quantity of a certain radioactive isotope reduces from 300 g to 208 g in 30 minutes.
a Find the half life of this isotope. Give your answer correct to the nearest second.
b How much of this isotope is left after 2½ hours? Give your answer correct to the nearest gram.
18 A quantity of a certain radioactive isotope reduces from 300 g to 208 g in 30 minutes.
a Find the half life of this isotope. Give your answer correct to the nearest second.
b How much of this isotope is left after 2½ hours? Give your answer correct to the nearest gram.