Transcript 2 cathoderays 1112

Day 6 11-11
1. Our atomic model was the first to
show… (use your notes from
Friday if needed)
Day 1 11-12
1. Our atomic model shows
electrons… (use your notes if
needed)
What does the inside of an
atom look like and how do
we know?
We have Atoms! – 1809-11
•
Joseph Gay-Lussac
– The first to do experiments to
determine ___________________
chemical formulas
Amadeo Avogadro
Gases are composed of ______________.
molecules
 Avogadro’s hypothesis states that equal
volumes of gases contain the _______
SAMEnumber of
molecules
gas _______________
at the same
temperature
______________
& ______________
pressure

We have Atoms! - 1800’s
relative atomic
symbols
 Michael Faraday
realized that
electricity
_______________
is
somehow related to
atoms and chemical
bonds.
weights
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
___________
Period 7 11-10
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?
Day 2 11-13
1. Put the following people, atomic
models, and / or discoveries in
chronological order:
Democritus,
Dalton,
electronDalton,
cloud, discovery of
electron, Bohr’s
model,
electron
Democritus,
Bohr’s
model
cloud
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 ________.