Radioactivity Questions and Answers

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State one use of radioactivity in agriculture.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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A radioactive isotope M decays by emitting two alpha and a beta particle to form 206 83Y.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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The half-life of Th is 1.9 years. If after 5.7 years the mass of Th was found to be 1.25 g. Determine the initial mass of the radioactive isotope

asked Jun 22, 2021 in Chemistry Form 4 by anony mous

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The half life of a certain radioactive substance is 24 days. Given that the initial sample of the substance has a mass of 64 g, determine the mass which is left after 72 days.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Arrange the following electromagnetic waves in the order of decreasing frequency: Microwaves; Gamma rays; Radiowaves; X-rays.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Figure 5 shows a radioactive element placed in an evacuated glass chamber. The element produces alpha, beta and gamma emissions.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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The following is a nuclear reaction equation: 63Li+10n →31H +xyP Determine the values of x and y.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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State two uses of radioactivity in medicine.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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