Transcript We have Atoms!

Day 4 11-7
1. One of Dalton’s ideas that we still
believe today = …
What does the inside of an
atom look like, and how do
we know?
We have Atoms! – 1809-11
Amadeo Avogadro
molecules
Gases are composed of ______________.
 Avogadro’s hypothesis states that equal
SAME
volumes of gases contain the _______
number of
gas _______________
at the same
molecules
pressure
______________
& ______________
temperature

We have Atoms! - 1850’s
• Cathode Ray Tubes
–Invented and studied in the mid1800’s
–A beam of cathode ray particles . . .
• applies ________,
force
• makes the temperature of objects
warmer
_________,
electric
• and is affected by ___________
and
___________
magnetic fields.
We have Atoms! - 1850’s
Cathode Ray Tubes
We have Atoms! - 1850’s
Cathode Ray Tubes
We have Atoms! - 1872
Dmitri Mendeleev
• Organized elements and “Father”
Periodic
Table
of the __________
__________.
• Determined properties of elements
that would be
discovered in the
______________
future
______
We have Atoms! - 1895
Wilhelm Röntgen
• Discovered that metals release
mysterious waves when they are
cathode ____.
rays
bombarded with _______
–These mysterious
waves are called
________...
X - rays
We have Atoms! - 1895
Wilhelm Röntgen
–These mysterious waves are
X - rays
called ________...
–These emissions are
nonspontaneous
______________
and can be
_________
turned on
and off
_______
We have Atoms! - 1896
Henri Becquerel
uranium
• Discovered that _______
ore can expose
photographic film.
–This phenomenon is
radiation
called ________.
–These emissions are
spontaneous are
__________,
always “on” and ...
__________,
We have Atoms! - 1896
Henri Becquerel
–This phenomenon is
radiation
called ________.
–These emissions are
spontaneous are
__________,
__________,
always “on” and ...
are NOT caused by an
____________________
outside source
___________________.
We have Atoms! – 1897 J. J. Thomson
cathode ______.
rays
• Studied _________
• All metals create
identical cathode rays
_______________________.
tiny
• Cathode ray particles are _____
negatively _________.
charged
and _________
• Thomson coined the
electron as another
_______
cathode ___
ray
name for ______
particles
_________.
We have Atoms! – 1897 J. J. Thomson
• Atom’s
appearance:
solid
–______
sphere
–_______
–Parts
negative electrons
• ________________
positive
• _______
surroundings
___________
Review / read section 4.2 and
complete #s 9-15 on page 109
- Due Friday 11-7
Day 5 11-10
1. Put the following people, atomic
models, and / or discoveries in
chronological order (oldest to
newest):
Democritus,
Dalton,
discovery
of
Dalton, electron cloud, discovery of
electron,
Bohr’s
model,
electron
electron, Democritus, Bohr’s model
cloud
Use your notes AND jigsaw notes!!!
What did Dalton contribute to modern atomic
theory?
Put the four atomic models we learned about in
chronological order.
What sparked the creation of each atomic
model?
What does the inside of an
atom look like, and how do
we know?
We have Atoms! – 1898
Marie Skłodowska Curie and Pierre Curie
• Investigated
radiation and its
_________
behaviors.
• The chemical
properties of
radioactive elements
change as radiation
_______
is emitted.
We have Atoms! – 1898
Marie Skłodowska Curie and Pierre Curie
• Isolated and
discovered the
polonium
elements _________
radium
and ________.