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NMHS Physics, M. Davis. Complete the following tasks on your own paper. Turn you paper over when completed. 1)Define half-life. 2)The half life for tritium.

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Presentation on theme: "NMHS Physics, M. Davis. Complete the following tasks on your own paper. Turn you paper over when completed. 1)Define half-life. 2)The half life for tritium."— Presentation transcript:

1 NMHS Physics, M. Davis

2 Complete the following tasks on your own paper. Turn you paper over when completed. 1)Define half-life. 2)The half life for tritium (hydrogen-3) is 12.3 years. If you have 10.0g of tritium approximately how much will remain at the end of 28 200 years?

3 Complete on your paper. 1)The isotope neptunium-238 has a half-life of 2.0 days. If 4.0 g of neptunium-238 was produced on Monday of this week, how many grams will remain on Tuesday of next week? 2) A sample of polonium-210 was purchased for your physics class on September 1 st. Its rate of decay is 2 x 10 6 βq. What kind of activity would be expected on June 1 st of the following calendar year?

4 Vocabulary Sort—organize the words into categories or hierarchy based on relatedness. Nuclear binding energy Strong nuclear force Nucleons Mass defect E = mc 2 Electron volt (eV) MeV HMWK: Answer questions p805

5

6 Use the following data to calculate the average atomic masses for the elements listed. Check your answer by consulting the periodic table. Isotope Relative Mass (amu)Relative Abundance (%) strontium-8483.9134280.56 strontium-8685.9092739.86 strontium-8786.9089027.00 strontium-8887.90562582.58 nitrogen- 1414.00307499.63 nitrogen - 1515.0001090.37

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