Transcript Document
CPO Science
Integrated Physics &
Chemistry
Chapter 18.2
Comparing Atoms
Developing A Model
What subatomic particles are found in
the nucleus?
— Protons & Neutrons
Are there any other subatomic
particles?
— Electrons
— Due electrons stay in one place?
What keeps the electrons from flying off the
atom?
Developing A Model
What are the charges of the subatomic
particles?
— Protons = positive
— Neutrons = neutral
If this is true what is the charge of
the nucleus?
— Electrons = negative
What keeps the electrons from flying off the atom?
Electromagnetic force: opposites attract & likes
repel
Then what holds the nucleus together?
Key Questions
How are atoms put together?
How are atoms identified?
What are isotopes & ions?
What is the connection between
atomic structure & light?
Developing An Experiment
How would you use this model to build
lithium – 6
— How many protons does this atom have?
— How many neutrons? How do you know?
— How many electrons? How do you know?
Now build your own lithium-6
How could you build lithium-7?
How can you create a charged lithium
atom either positive or negative?
Tips
Run The Experiment
Read over section 1 & 2 very carefully
before you get started
Follow the rules.
When you have played at least 2 games
start section 3 in the investigation
manual.
What did you learn?
Complete section 3 in the investigations
manual
electron
neutron
proton
Developing An Experiment
What cause light?
Do you think different elements
give off different colors of light?
—Why?
What are some common lights?
—What color of light do they
produce?
Run The Experiment
Tips:
— Read section 5 before you get started
— Point the slit at the right of the
spectrometer directly at the light source.
— Record where the vertical line appears
— You may have to estimate the value
What did you learn?
Can the spectral lines help you identify the element?
Do the the spectral lines explain the colors of the
light?
Can you think of any ways to use this information?
Summary
How are atoms put together?
What are some ways to can identify an
atom?
What is an ion & an isotope?
How is the atomic configuration
connected to the light an element
produces?