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WorksheetsHistory of Atomic Theory
Total questions: 20
Worksheet time: 24mins
Which of these is part of Dalton's atomic theory?
Every element is identical on the atomic level
Atoms are made of elements
Two atoms of the same element are identical
Atoms never interact with other atoms
In the chocolate chip cookie model, the "DOUGH" was thought to have a(n)…
Average charge of 5
Negative charge
Positive charge
Neutral charge
How did the Gold Foil experiment DISPROVE the chocolate chip cookie model of the atom? (2 answers)
The chocolate chip cookie model didn't account for a nucleus in the center; the α-particles bounced off this nucleus
The α-particles bounced off the electrons in the center of the atom
The α-particles that got close enough to the nucleus were curved/deflected
The α-particles turned into energy and cooked the cookie which is delicious
The electrons were too small to deflect the α-particle
What's the difference between these two atomic models?
The Bohr model has specific paths for the electrons, whereas the Rutherford model just has electrons wherever
The Bohr model has a nucleus and the Rutherford model doesn't
The Rutherford model has electrons because Rutherford discovered the electron
Rutherford's model is slightly smaller because Bohr felt like he deserved it
The Bohr model is the first atomic model to describe electron shells. What does this mean?
Calcium carbonate exoskeletons to protect the electrons from predators
Special places the electron can be without the nucleus interfering
Levels and paths that the electrons travel around when they orbit the nucleus
Quantum spin probabilities which account for electron momentum
Which is NOT a feature of the Bohr model?
Nucleus in the middle
Electrons on specific paths
Electrons orbiting the nucleus
Neutrons in the nucleus
More than 1 electron
The Heisenburg Uncertainty Principal states that if you know the _______, you do not know the momentum of an electron
Positive charge value
Position
Vector path
Speed
Why do we talk about Heisenberg in our study of the development of atomic models?
Because he predicted the possibility of neutrons
Because his research proved that the Bohr model was ALMOST but not quite correct
Because nobody understood that electrons were smaller than protons
Because he was BFFs with Schrodinger and wanted to be included
Because he was the only one who didn't assume electrons behaved like protons
Ultimately, Schrodinger's model had electrons in ______ around the nucleus
Specific orbits
Nodes
Waves
Clouds
What does this graph indicate?
The probability of an electron touching the nucleus is 100%
The Schrodinger model allows for the electrons to be anywhere they feel like
The likelihood of an electron's position depends on its distance from the nucleus
That Aristotle was WRONG and he should feel bad :(
What is a node?
A space between electron shells
The region where an electron is least likely to be
Where the probability graph has Y=0
A region that is not part of an electron shell
Whose model is closest to the currently accepted standard?
Democritus's "Pumpkin is made of pumpkin atoms"
Chocolate Chip Cookie model
Bohr's atomic orbits
Wave Mechanical Model
