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