Technetium-99 is used for brain scans. The isotope has a half-life of six hours. A laboratory needs 200 g for an experiment. If shipment takes 72 hours, how much Technetium-99 should be prepared so that the appropriate amount remains after shipping?

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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the answer for sodium is 0.186

the answer for rubidium is 0.251