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Chemistry 6 to 12

Question 20 of 30

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Competency 5—Knowledge of atomic theory and structure

DIRECTIONS: Read the question and select the best response.

The alpha emitter superscript 226 subscript 88 capital R lowercase A has a half-life of 1590 years. How much of a  12 gram  sample of superscript 226 subscript 88 capital R lowercase A would remain after  127 times 10 to the fourth power  years?

Choose an answer
Enter to expand or collapse answer.Answer expanded
Correct Response: B.