Suppose You Start with 1 Kilogram of a Radioactive Substance

question 45

Multiple Choice

Suppose you start with 1 kilogram of a radioactive substance that has a half-life of 10 years.Which of the following statements will be true after 20 years pass?

• A)You'll have 0.25 kilogram of the radioactive substance remaining.
• B)All the material will have completely decayed.
• C)You'll have 0.75 kilogram of the radioactive substance remaining.
• D)You'll have 0.5 kilogram of the radioactive substance remaining.

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