Chemistry

Chemistry Harmed Adul-Wandi Chemistry 275a Dr Lippincott Harvard University Isotopes and Atomic Mass Objective: 1. Determine the average weight of each isotope of the fictitious element vegium. 2. Determine the relative abundance of isotopes of vegium. 3. Calculate from experimental data the atomic mass of vegium. Materials: A sample of vegium on a plastic cup small-scale balance Procedures: 1. Weigh all the beans, all the peas, and all the corn. 2. count all the beans, all the peas, and all the corn. 3. Divide all the mass of each by the isotope (beans, peas, and corn) by the number of each isotope to get the average mass of each isotope. 4. Divide the number of each isotope by the total number of particles, and multiply by 100 to get the percent abundance of each isotope. 5. Divide the percent abundance from step 4 by 100 to get the relative abundance of each isotope. 6. Multiply the relative abundance from step 5 by the average mass of each isotope to get the relative weight of each isotope. 7. Add the relative weights to get the average mass of all particles in vegium, the "atomic mass." Note: When you weigh the various types of vegetables, you may encounter some problems. each, mass, isotope, relative, beans, abundance, weigh, vegium, number, average, percent, multiply, weight, total, might, corn, balance, atomic, while, weights, sample, peas, isotopes, divide, data, vegetables, various, successfully, step, right, result, procedures, particles