Which of the following statements is true? A.Chemical reaction rates vary with the conditions of the change, while nuclear decay rates do not. B.Nuclear decay rates vary with the conditions of the change, but chemical reaction rates do not. C. Both chemical reaction rates and nuclear decay rates vary with the conditions of the change.D. Neither chemical reaction rates nor nuclear decay rates vary with the conditions of the change.
Chemistry · High School · Thu Feb 04 2021
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A. Chemical reaction rates vary with the conditions of the change, while nuclear decay rates do not.
- Chemical reaction rates can be affected by several factors including temperature, pressure, concentration of reactants, surface area, and the presence of catalysts. The rate of a chemical reaction generally increases with temperature, for example, because heat supplies the reactant molecules with more energy, increasing their movement and the frequency and energy of collisions.
- In contrast, nuclear decay rates are consistent and are not affected by external conditions such as temperature, pressure, or chemical state. Each radioactive isotope has a characteristic half-life, which is the time required for half of the isotope to decay, and this value does not change with environmental conditions.