What is the activity of a radioactive sample?
Activity is the number of decays per second.
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What is the unit of activity in radioactivity?
The unit of activity is the Becquerel (Bq).
1 Bq is equivalent to 1 decay per second.
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What is the decay constant in radioactivity?
The decay constant is the probability per unit time that a nucleus will decay.
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What is the formula linking decay constant (λ) and half life (T21)?
T21= half life (s)
λ = decay constant (s-1)
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What is the formula linking activity (A), decay constant (λ), and number of undecayed nuclei (N)?
A = activity (Bq)
λ = decay constant (s-1)
N = number of undecayed nuclei
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What happens to the activity of a radioactive sample over time?
The activity of a radioactive sample decreases over time as the number of unstable atoms decreases.
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What does a larger decay constant indicate?
A larger decay constant indicates a shorter half-life, meaning the radioactive sample decays more quickly.
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