Chapter 82 of 2364 min read

Radioactivity and decay law

Why this is asked: A radioactive decay constant is fixed and completely unaffected by temperature, pressure or chemical combination, unlike an ordinary reaction rate — so half-life stays exactly the same regardless of how much substance remains or what conditions it's kept in.

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Test yourself

• $_{82}^{290} X α Y e^{+} Z e^{-} P e^{-} Q$ In the nuclear emission stated above, the mass number and atomic number of the product $Q$ , respectively, are:

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