# Pure Sample Of A Radioactive Substance

Students studying physics are interested in all facets of nature, both on a macroscopic and microscopic scale. Its field of study includes the nature and genesis of gravitational, electromagnetic, and nuclear force fields in addition to the behaviour of things when subjected to certain forces. These characteristics make physics an extremely challenging topic for the majority of pupils. Writersabc can assist you with the greatest and most qualified writers. Here is an illustration of a query.

A container holds a pure sample of a radioactive substance with a half-life of 2 hours. Part A Which of the following statements are true? a) After 1 hour, less than 50\% of the original atoms in the container will have decayed. b) After 1 hour, more than 50\% of the original atoms in the container will have decayed. c) After 2 hours, 50\% of the original atoms in the container will have decayed. d) After 4 hours, 25\% of the original atoms will have decayed. e) After 4 hours, the total number of atoms in the container will be reduced by 75\%. Answer: A and C  In addition to the sample mentioned in Part A, consider a pure sample of a different radioactive substance that has a half-life of 1 hour. Assume that you initially have twice as many atoms of this new sample as you have of the previous sample. The table below summarizes this information:  Sample Half-life (hours) Original number of atoms A 2 N_0 B 1 2N_0  Part B Which of the following statements about samples A and B are true?  a) After 1 hour, a larger percentage of undecayed atoms will be left in sample A than in sample B. b) After 1 hour, a larger number of atoms will have decayed in sample B than in sample A. c) After 2 hours, the same number of atoms will have decayed in both samples. d) After 2 hours, both samples will have the same number of undecayed atoms.

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