Transcript Unit 1.2: Antoine Lavoisier and the History of the Atom

Unit 1.2: Antoine Lavoisier
and the History of the Atom
Bell Work: September 2
•Summarize the Law of the Conservation
of Matter/Mass in two sentences
•If you finish early, study for your quiz
•Remind me about Good Things!
Lavoisier Video
• https://Lavoisier Law of Conservation of Mass Video
Definitions: Antoine Lavoisier Article
• Ferme Generale was a private company that collected taxes for the
Crown
• Phlogiston Theory was the theory that there was a substance called
phlogiston which was odorless, tasteless, colorless, and weightless.
This substance was thought to be given off when the material
containing this substance was burned.
• Calx is the crumbly residue left over after a mineral or metal has
been heated.
Antoine Lavoisier Web
• With the person sitting next two you (at your
table of 4), write 2 facts from the biography on
each of the four subtopics of the web.
Models of the Atom
• With the person sitting next to you (in your table of 4) put
the atomic model cards in chronological order.
• On a sheet of paper with both of your names on it, write
the following:
• List the order of the models
• Compare and contrast each of the models. What is the
difference between each one? What is similar about each one?
Be extremely detailed in your explanations. Write in full
sentences.
• For each model, explain your reasoning for the placement of
the model. Be specific and descriptive. Write in full sentences.
Create an atomic Model Flip Chart
Inside
Outside
Democritus
Dalton
Thomson
Rutherford
Bohr
Present
Model
Picture
• Place your paper on
your desk horizontally
• Fold both sides towards
the center
• Cut the flaps into thirds
horizontally
• Label like the pictures
(leave room to write on
the inside flaps)
Description
Description
Picture
Experiment
Picture
Description
Description
Picture
Picture
Description
Description
Picture
Experiment
Experiment
John Dalton Atomic Model
• September 1766-July 1844
• He was an English chemist,
meteorologist, and physicist best
known for reviving the atomic
model and research into color
blindness
John Dalton Atomic Model
• Elements are made of extremely small particles
called atoms
• Atoms of a given element are identical in size,
mass, and other properties.
• Atoms cannot be subdivided, created, or destroyed
• Atoms of different elements combine in simple
whole number ratios to form chemical compounds
• In chemical reactions, atoms are combined,
separated, or rearranged.
J.j. Thomson Discovers the electron
• The electron was the first subatomic particle discovered
• Used a cathode ray tube
• Cathode Ray Tube Video
• Electricity enters the cathode
and comes out the anode in a
vacuum tube (no air in the
tube)
• A beam of light called the
“Cathode Ray” can be seen
• This ray can be repelled or
attracted using magnets
• Repel= negative side of
magnet
• Attract = positive side of
magnet
• This means that the ray
must be negative (opposites
attract)
• Ray = 1000x lighter than
Hydrogen atom
• First subatomic particle!