The Half-Life for the Spontaneous Decay of Technetium-99m Is 6

question 55

Multiple Choice

The half-life for the spontaneous decay of technetium-99m is 6.0 hours.How much of a 0.20 g sample of this isotope remains after 4.5 hours?

• A) 0.05 g
• B) 0.08 g
• C) 0.12 g
• D) 0.15 g
• E) 0.20 g

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