John Daltons 1808 atomic theories. Tick the correct answers.
All matter is made up of small identical particles
There were only 4 elements
particles named atoms could be broken into smaller particles
mass could be created
William Cooke's cathode ray tube proved the existence of
that charged particles were being emitted by the possitive cathode ray
that charged particles were being emitted by the negative cathode ray
that atoms were indivisible
J.J. Thomson proved the existence of electrons by
placing a negative plate near the cathode ray tube
seeing the deflection of the rays when a positive plate was placed near the cathode ray tube
the colour of the ray changed
he did not prove the existence of electrons
Name the scientist that measured the charge of the electron
Dalton
Einstein
Millikan
Rutherford
Thomson believed that the atom was made up like
a cheesecake - a layer of a positive charged and a layer of negatively charged
a wheel on a car - positive center with a negative spherical rim
a plum pudding - a mainly positive sphere with negatively charged electrons embedded in it
The results of Rutherford's experiment
Atoms were indivisible
Atoms were composed of mainly negative spheres
Atoms were composed of mainly empty space
Chadwick is known for the discovery of
the neutron
the alpha particle
the proton
Errors that occurred when Johann Dobereiner tried to organise the known elements into triads
they didnt know there atomic weights
There wasnt enough known about the properties of the elements
Only a few elements could be organised in this way
The anode is the
positively charged electrode
negatively charged electrode
A mass spectrometer can be used to measure
measure the wavelength of light
measure the mass and abundance of isotopes
measure the size of the magnetic field
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