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WorksheetsAtomic models
Total questions: 7
Worksheet time: 4mins
What did Thomson deduce after observing that metals emmited rays under certain circumstances?
That matter was mostly empty
That atoms have a positive nucleus
That atoms contain negative particles
According to Thomson's model, what is the positive part of the atom like?
A cloud
A particle
A nucleus
What did Rutherford's team discover when they were trying to experimentally test Thomson's model?
That the positive part of the atom was a cloud that totally filled matter
That there were electrons inside atoms
That the positive part of the atom is concentrated in a tiny nucleus
An atom with Z=3 and A=7...
... is impossible
... has 3 protons
... has 7 neutrons
A positive ion with Z=10 and A=21...
... has 10 electrons
... 9 electrons
... has 8 electrons
... has 11 electrons
Bohr suggested that...
... electrons spin around the nucleus all in the same orbit
... electrons spin in random orbits that are impossible to predict
... electron orbits depende on their energy levels
Nowadays we know that in all atoms...
... electrons don't really spin, but move most of the time within certain zones
... electrons move around so chaotically, that we can know nothing about where they could be
... electron spin like planets, in orbits that depend on their energy levels
