Nuclear Chemistry and Radioactivity — Important Questions
Maharashtra Board · Class 11 · Chemistry
44 important questions from Nuclear Chemistry and Radioactivity for Maharashtra Board Class 11 Chemistry, with answers.
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Important Questions from Nuclear Chemistry and Radioactivity
What is the half-life of a radioactive element?
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Time for half the nuclei to decay
Half-life (t₁/₂) is the time required for exactly half of the radioactive nuclei in a sample to undergo decay.
Which of the following factors affect the rate of radioactive decay? (Select all correct answers)
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Number of radioactive nuclei present
Radioactive decay rate depends only on the number of radioactive nuclei present. It is independent of external conditions like temperature, pressure, or catalysts.
In beta minus (β⁻) decay, what happens to the atomic number?
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Increases by 1
In β⁻ decay, a neutron converts to a proton and electron. The electron is emitted, increasing the atomic number by 1 while mass number remains same.
What is nuclear binding energy?
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Energy needed to break nucleus into nucleons
Nuclear binding energy is the energy required to completely separate all nucleons (protons and neutrons) in a nucleus.
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