The nuclear reaction shown below is an example of what type of process? 
Th → 
Rn + 
He
Definitions:
Trans-4-methylcyclohexanol
A chemical compound featuring a cyclohexane ring with a methyl group and an alcohol group in a trans configuration.
80th Percentile
A value below which 80 percent of the data in a data set falls, indicating the upper 20% of values.
Mean
The average of a set of numbers, calculated by summing all numbers in the set and then dividing by the count of numbers.
Standard Normal
A special case of the normal distribution with a mean of zero and a standard deviation of one.
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