What is the half-life of a radioactive substance?
Correct Answer: Half-life is the time taken for half of a radioactive substance to decay.
- Step 1: Understand that a radioactive substance is one that can decay over time.
- Step 2: Know that decay means the substance breaks down into something else.
- Step 3: The half-life is a specific time period.
- Step 4: During this time, half of the original amount of the substance will have decayed.
- Step 5: For example, if you start with 100 grams of a substance, after one half-life, you will have 50 grams left.
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