Tritium ( H )Is an Isotope of Hydrogen That Is Sometimes Used

question 61

Multiple Choice

Tritium (
H ) is an isotope of hydrogen that is sometimes used to make the hands of watches glow in the dark.The half-life of tritium is 12.3 years.After 49 years,approximately how much of the original tritium remains?

• A)50%
• B)25%
• C)12.5%
• D)6.25%
• E)3.12%

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