Lab: Atomic Mass of Beanium

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Do NOT write on this paper, answer on your own piece of paper !!!!!!!!!!!!!!!!!!!!!!!!!!!
Lab: Atomic Mass of Beanium
Purpose:
To analyze the isotopes of beanium & calculate its atomic mass
Materials:
Sample of Beanium
Calculator
Balance
Paper Plates
Procedure:
Obtain a sample of beanium. Separate the three isotopes. Measure the mass of each isotope.
Count the number of each isotope. Make a table to record your results.
White Beanium
Red Beanium
Pinto Beanium
Total
Total Mass (g)
Number of
particles
Average mass (g)
Percent
Abundance (%)
Atomic Mass
Relative Mass (g)
Calculations:
1. Calculate the average mass of each isotope.
Divide the total mass by the number of particles of that isotope.
2. Calculate the percent abundance of each isotope.
Divide the number of particles of the isotope by the total number of
particles and multiplying by 100.
3. Calculate the relative mass of each isotope.
Divide the number of particles of the isotope by the total number of
particles and multiply by its average mass.
4. Calculate the atomic mass of beanium: Add all relative masses together.
Analysis:
5. If you were to reach inside a bucket of beanium and pull out one atom (bean), what isotope would you
most likely pull out? Explain.
6. Explain the differences between the atomic mass of your beanium sample and that of your neighbor
group.
7. Explain why the difference would be smaller if larger samples were used.
8. Using your notes describe how mass number is different than average atomic mass?
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