The Ctrl+V game (Orpaste)

Maybe I could stop on the way down to Baltimore on Thursday. I have no idea if that's on the way or totally out of the way.
 
Tiesto1.jpg
 
Isotopes and Average Atomic Mass

Objectives: The objective of this lab is to understand the relationship between isotopes and the average atomic mass of any given element.

In this lab, you have discovered an ore containing 3 isotopes of a new element: Name your new element and record all observations of each isotopes.

Procedure: 1) Separate the isotopes into 3 groups according to type.
2) Count the number of isotopes in each group and record and add the numbers for your total number.
3) Weigh each group and record the mass in grams of each group of isotopes. Add the mass of all 3 groups together for your total mass.
4) Calculate an average mass for each isotope as follows:
Mass of isotope A / number of isotope A
5) Calculate the average mass for your new element as follows
Mass of Total / number of total.
6) Calculate the relative abundance (occurrence) of each isotope.
Number of Isotope A / number of total = relative abundance
7) Calculate the relative atomic mass for each isotope

Data, Observations, Calculations

Mass (g) Number Average mass Relative abundance Relative atomic mass
Reecesiotes 13.99 18 0.774 0.20 0.15
m&mites 35.71 41 0.8759 0.47 0.41
skillitlesite 31.5 29 1.071 0.33 0.35
Total element 80.95 88 0.92 (a) 1.0 0.91 (b)


1) Are the figures in box (a) and box (b) identical? Should they be?
2) Discuss isotopes and the effect they have on the atomic mass.
3) Distinguish between mass number and atomic number.
 
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