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)?