Name:________________________ Date:________Period:_______ 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. Record your results. Remember: An isotope are atoms of the same element with different number of neutrons. AND A sample of beanium are “atoms” that will have different masses. Data: 1. Total mass of the entire sample (all beans):__________ 2. Total number of “atoms” in the sample (beans): _______________=T#atoms Total Number Average Percent Relative Mass Mass of mass of Abundance (grams) per “atoms” each (%) (B ÷ T#atoms type (beans) type (B ÷ T#atoms x x C) (grams) in a (grams) 100) (A) sample (A/B=C) (B) White Beanium Red Beanium Pinto Beanium 3. Atomic mass (add all relative masses together) (this would be the number put on the periodic table): ____________ Analysis: 1. What is the definition of an isotope? 2. Did all particles of Beanium have the same mass? 3. What is a similarity between the three isotopes, what is the difference? 4. Then using this analogy to real atoms: If you had a bunch of atoms of uranium with different masses, what atomic particle would make that difference? 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? GIVE EVIDENCE FROM DATA TABLE! 6. Looking at your data table, what type of beanium (red, white, or pinto) had an average mass that was closest to the calculated atomic mass (data #3)?