Nuclei | MCQs#2| NEET| JEE | Summary and Q&A

TL;DR

This content discusses nuclear reactions, radioactive decay, and various concepts related to them in a concise video format.

Key Insights

• 🎮 The video provides a comprehensive review of nuclear reactions and radioactivity.
• ❓ The concept of binding energy per nucleon is explained, along with its calculation using given values.
• 🤕 The determination of the age of a rock sample is discussed, taking into account isotopic ratios and half-life.
• 😒 The variation of radioactive activity over time and the use of exponential decay equations are presented.
• #️⃣ The sequence in which radiations are emitted in a nuclear reaction is explained based on changes in atomic number and mass number.

Transcript

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Questions & Answers

Q: How can the binding energy per nucleon of lithium and helium be calculated?

The binding energy per nucleon of an element can be determined by dividing the total binding energy by the number of nucleons. In the given nuclear reaction, the binding energy per nucleon of lithium and helium nuclei can be calculated using the given values and formulas.

Q: How can the age of a rock be determined using the ratio of two isotopes?

If the ratio of two isotopes is known in a rock sample, the age of the rock can be determined by comparing it with the known half-life of the radioactive isotope. The equation Mx/M = (1/2)^t/t1/2 can be used to calculate the age.

Q: How does the activity of a radioactive sample change over time?

The activity of a radioactive sample decreases over time following the exponential decay law. It can be calculated using the equation N = N0 * (1/2)^(t/t1/2), where N is the final activity, N0 is the initial activity, t is the elapsed time, and t1/2 is the half-life.

Q: In a given reaction, why are the emitted radiations in a specific sequence?

In a given reaction, the emitted radiations follow a sequence based on the change in the atomic number and mass number of the nucleus. This sequence corresponds to the different types of decay, such as alpha decay, beta decay, or gamma decay, which occur in a specific order.

Summary & Key Takeaways

• The video provides a comprehensive review of nuclear reactions, nuclear energy, and radioactive decay.

• Multiple-choice questions are presented to test the viewer's understanding and knowledge.

• Topics covered include binding energy, half-life, and the emission sequence of radioactive radiation.