Download Structure of Matter

Structure of Matter
Democritus
J.J Thompson
Antoine Lavoisoer
Today’s
Atomic
model
Chadwick
Rutherford
• Matter: anything that has mass and
takes up space.
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• Atom: A small particle that makes up
most types of matter.
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Fun Fact:
Atoms are so small it would
take 1million of them in a
row to equal the thickness of a human hair.
• Democritus, a Greek philosopher
thought of the atom.
Different types of atoms exist
for every type of matter.
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• Antoine Lavoisoer proved how matter
can change from one form to another.
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NO! Wood does
Not disappear
When it burns,
It turns into
something else!
Matter can
Disappear!
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• Law of Conservation of Matter: Matter
is not created nor destroyed, it only
changes form.
OXYGEN + Fire
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Water vapor & Carbon Dioxide
=
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• JJ Thompson: conducted experiments
and came up with the idea of Electrons
It looks
like chocolate chip
cookie dough!
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• Electron: an invisible, negatively
charged particle that is part of an atom.
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I’m negative
AND invisible?!
• Earnest Rutherford called the positively
charged central part of the atom the
nucleus and positively charged
particles neutrons.
I came up with the
crazy experiment
on the next slide!
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• Nucleus: the positively charged, central
part of the atom.
• Protons: positively charged particles in
the nucleus.
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• James Chadwick experimented and
found some particles had no charge.
He called these particles neutrons.
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Some of the particles are
not electrified.
Hmmmmm.
I will call them Neutrons!
• Neutron: particles in an atom that have
no charge.
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• The Electron Cloud Model:
• Scientists believe today that electrons
move around the nucleus in a cloud.
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Democritus
J.J Thompson
Antoine Lavoisoer
Today’s
Atomic
model
Chadwick
Rutherford
Electron
Nucleus
Proton
Neutron
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