
Concept explainers
(a)
Interpretation: Half-life of copper-
Concept introduction: A process through which, an unstable nuclide loses its energy due to excess of protons or neutrons is known as radioactive decay. The cause of instability of a nuclide is its inefficiency in holding the nucleus together. Decay constant is the quantity that expresses the rate of decrease of number of atoms of a radioactive element per second. Half-life of radioactive sample is defined as the time required for the number of nuclides to reach half of the original value.
The decay constant can be calculated by the formula given below.
The time of decay can be calculated by the formula given below,
To determine: The value of decay constant in
(b)
Interpretation: Half-life of copper-
Concept introduction: A process through which, an unstable nuclide loses its energy due to excess of protons or neutrons is known as radioactive decay. The cause of instability of a nuclide is its inefficiency in holding the nucleus together. Decay constant is the quantity that expresses the rate of decrease of number of atoms of a radioactive element per second. Half-life of radioactive sample is defined as the time required for the number of nuclides to reach half of the original value.
The decay constant can be calculated by the formula given below.
The time of decay can be calculated by the formula given below,
To determine: The number of decay events in the first second.
(c)
Interpretation: Time in which one have to do the experiment of measuring radioactivity of copper-
Concept introduction: A process through which, an unstable nuclide loses its energy due to excess of protons or neutrons is known as radioactive decay. The cause of instability of a nuclide is its inefficiency in holding the nucleus together. Decay constant is the quantity that expresses the rate of decrease of number of atoms of a radioactive element per second. Half-life of radioactive sample is defined as the time required for the number of nuclides to reach half of the original value.
The decay constant can be calculated by the formula given below.
The time of decay can be calculated by the formula given below,
To determine: The time for which the given experiment is to be done so that the radioactivity does not fall below

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Chapter 19 Solutions
Chemistry
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