Question

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 200mg were prepared in the technetium generator this morning. How many milligrams would remain after the following intervals?
1- One half life.
2- two half-lives
3- 18 hr
4- 30 hr

Answer 1

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