Modern Atomic Theory
Click on the correct answer
1
How many orbitals are there in the third energy level?
2
4
6
7
9
2
"No two electrons are allowed to have the same four quantum numbers." This is known as what principle?
Wave-particle duality
Pauli Exclusion
Heisenberg's uncertainty principle
Daltons principle
Hunds rule
3
"Electrons must occupy the lowest possible energy level available." This is know as what principle.
Heisenbergs uncertainty
Pauli exclusion
Aufbau
Hunds rule
Daltons principle
4
How many valence electrons are there in the scandium atom?
1
2
3
5
8
5
What does the Schrodinger wave equation calculate?
The energy content of an electron.
The exact location of an electron.
The shape of the charge cloud.
The probability of locating an electron in space.
The number of electrons in an atom.
6
How many paired electrons are there in an atom of sodium?
1
4
6
10
11
7
What was the contribution of deBroglie toward our understanding of the atom?
The wave-particle duality of nature
The uncertainty principle
The discovery of the quanta
The idea that electrons are in probable orbits around the nucleus.
Electrons behave as waves.
8
What is the correct electron configuration for the element iron (Fe)?
1s
2
2s
2
2p
6
3s
2
3p
6
1s
2
2s
2
2p
6
3s
2
3p
6
3d
8
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
4p
6
1s
2
2s
2
2p
6
3s
2
3p
10
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
6
9
What does the Heisenberg uncertainty principle state about the electron?
The electron is a wave function
The electron has mass and at the same time behaves as a wave.
It is impossible to know both the position and momentum of an electron
The electron must occupy specific energy levels within the atom.
Atoms release energy when electrons fall from high energy levels to low energy levels.
10
According to the deBroglie equation, all matter exhibits wave-like properties when in motion. Why then, does a baseball not emit radio waves when it is thrown?
The baseball is not a wave.
The mass of the baseball yields a deBroglie wavelength that is too small to detect.
The baseball has a liquid center.
The baseball can not travel the speed of light.
The baseball is unaffected by the deBroglie concept