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You have equal masses of the radioactive isotopes 226Ra, 98Tc, and 59Ni. Rank in order the activities of the three isotopes. tomic mass unit =

You have equal masses of the radioactive isotopes 226Ra, 98Tc, and 59Ni. Rank in order the activities of the three isotopes.

tomic mass unit = 1.66110^-24 grams

Technetium-99 has a half-life of 6 hours. Suppose a lab has 80 mg of technetium-99. How much technetium-99 is left after 24 hours? what is the activity for one gram of Tc-98

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