Neco 2020 Physics Question 17

Practice objective / multiple choice question 17 from the 2020 Neco Physics examination.

Neco 2020 Physics Objective / Multiple Choice Hard Difficulty

Question 17 NECO • 2020 • PHYSICS • objective

A 2.0\,g sample of a radioactive isotope X (molar mass \(240\,\text{g\,mol}^{-1}\)) decays to Y with a half‑life of \(8.0\,\text{yr}\). The daughter nuclide Y is itself radioactive with a half‑life of \(2.0\,\text{yr}\) and decays to a stable nuclide Z. Initially only X is present. Calculate the activity of Y (in becquerels) after \(12\,\text{yr}\).

A. 8.1×10^{12} Bq

B. 1.2×10^{13} Bq

C. 4.5×10^{12} Bq

Correct Answer D. 6.2×10^{12} Bq

Correct Answer

Correct Option:

6.2×10^{12} Bq

This is Neco 2020 Physics Question 17. It is one of the objective questions from the 2020 Neco Physics examination.

Difficulty level: Hard .

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