New Ideas of Atoms
What do atoms make up
everything
All matter is composed of...
Atoms
Niel Bohr discovered that electrons travel on an
orbit
Did Ernest Rutherford find out that atoms have a nucleus
yes
Democritus said there was a ____ number of atoms.
Infinite
What four elements did Aristotle believe made up the materials on Earth?
Earth, water, Fire, Air
What did John Dalton introduce?
The Atomic Theory
Niel Bohr's model is the most____model of an atom
common
True or False: Robert Millikan discovered that atoms have electrons
true
The plums in the plum pudding were ____ charged.
negative
Are atoms divisible?
no
Atoms are ____ blocks
indestructable
Schrodinger, Heisenberg, and Einstein created the ____ model.
modern cloud
Did Ernest Rutherford do the gold foil experiment?
yes
The pudding in the plum pudding model was ____ charged.
positive
What did Aristotle believe about empty space?
It did not exist.
Thomson's model is called
The Plum Pudding Model
They discovered that atoms have an electron cloud because
electrons are moving so fast that they are basically just energy.
What experiment did Robert Millikan use to discover the electron?
Falling Oil Drop
According to Millikan, electrons are negatively charged and surround the ___.
Nucleus
Did Aristotle believe in the Atomic theory?
no
What subatomic particles are in Thompson's Theory?
protons and electrons
Schrodinger, Heisenberg, and Einstein discovered that an electrons...
location depends on how much energy the electron has
How did Ernest Rutherford know about the nucleus?
The particles bounced back
Planets circling the sun represents what model?
The Niels Bohrs model