Answer:-
To work out half-life, you need to know the time it takes for half of a substance to decay. Start with the original amount and see how long it takes to reduce by half. For example, if you start with 100 grams and after 5 hours only 50 grams remain, the half-life is 5 hours. You can repeat the process: after another 5 hours, you'd have 25 grams. For more complex cases, use the formula: N = N?(1/2)^(t/T), where N is the remaining amount, N? is the initial amount, t is time, and T is the half-life.
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