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?