By: Santiago Chaparro
Dr. Snyder
2011-2012
1. Periodic Table
2. Conversions
3. Significant Figures Packet
4. Constructing a Model
5. Mole Concept
6. Mole Concept Lab
7. Atomic Theories Handout
8. Atomic Theories Drawings
I. Title: Constructing a Model
II. Purpose: To understand how scientists make inferences about atoms without touching
or seeing them.
III. Materials: 1. Closed container, 2. Various objects, 3. Balance
IV. Procedure:
1. Take the first container after copying down the tables without data in them and
observe the continents with the container closed.
2. Write down the number of objects you think are in there.
3. Write down the approximate mass of the container.
4. Then write down what you think is inside the container.
5. Next do the same thing for container numbers 2-5.
6. After that, go to the next part and repeat steps numbers 3-5 without looking and
finally with looking.
V. Data:
Part A: Closed Container
Group
No.
Number
of
objects
Mass
of
objects Kind of objects
1 8 67.5 beads
2 9 127.5
metal objects,
coin
3 20 96 small balls
4 6 291 balls
5 2 100 ball
Part B: Open Container without Looking
Group
No.
Number
of
objects
Mass
of
objects Kind of objects
1 7 67.5 ring, coin, metal thing
2 8 127.5 eye, ear, block, 2
figurines, 2 coins
3 30 96 keys, 2 erasers, plastic
balls
VI. Analyze and Conclude:
1. Scientists often use more than one method to
in the investigation?
2. Of the observations you made, which were qualitative and which were
quantitative?
3. Using the data you gathered, draw a model of the unknown object(s) and write a
brief summary of your conclusions.
VII. Answers:
1. I used 3 ways of gathering information. Each drew its own different information.
2. Number of objects and mass of objects are quantitative and the kind of objects is
qualitative.
3. There was usually an item that I did not know about or that I describ
Most of the items were small. The items were sometimes the same for 2 different
containers. Sometimes it was hard to figure out an item just using your hands
without looking.
Analyze and Conclude:
Scientists often use more than one method to gather data. How was this illustrated
in the investigation?
Of the observations you made, which were qualitative and which were
Using the data you gathered, draw a model of the unknown object(s) and write a
brief summary of your conclusions.
I used 3 ways of gathering information. Each drew its own different information.
Number of objects and mass of objects are quantitative and the kind of objects is
There was usually an item that I did not know about or that I describ
Most of the items were small. The items were sometimes the same for 2 different
containers. Sometimes it was hard to figure out an item just using your hands
gather data. How was this illustrated
Of the observations you made, which were qualitative and which were
Using the data you gathered, draw a model of the unknown object(s) and write a
I used 3 ways of gathering information. Each drew its own different information.
Number of objects and mass of objects are quantitative and the kind of objects is
There was usually an item that I did not know about or that I described wrong.
Most of the items were small. The items were sometimes the same for 2 different
containers. Sometimes it was hard to figure out an item just using your hands
I. Title: The Mole Concept
II. Purpose: To identify the identity of each sample of each sample based on observation
and numerical data.
III. Materials: 1. Mole sample set 2. Balance
IV. Procedure:
1. First you start of by copying down the tables and then you leave out the
information. Then you make observations.
2. Second, so find the mass by weighing the mole of any substance and jot it down.
3. The number of moles is the same for every substance which is one.
4. Thirdly you find out the number of atoms which is 6.022 for all of the substances.
5. That information should allow you to figure out the elements.
V. Data:
Sample Observations
A heavy, shiny, reflects light
B light, shiny, reflects light
C heavy, dark
D heavy, brown, not shiny
Sample Mass(g) # of
moles
# of
atoms
identity of
element
A 65.25 1 6.022 zinc
B 27 1 6.022 aluminum
C 56 1 6.022 iron
D 63.5 1 6.022 copper
VI. Analyze and Conclude:
1. What lead you to the determination of each element?
2. If element was exactly one mole, why were the masses different?
3. Determine the actual mass a single atom each sample (mass of sample in g
/Avogadro’s number).
VII. Answers:
1. The mass.
2. Because they have different masses per atom.
3. A= 1.08x1023
B=4.48x1023
C=9.30x1023
D=1.05x1023