Periodic Trends
Atomic Radius increases from left to right. True or False?
False, they increase
What did the double slit experiment prove and how can this be applied to electrons?
It proved that light can act as both a wave and particle. Electrons may be interpreted as a particle but it also acts as a wave orbiting the nucleus
What did Thomson's Cathode Rays and the plum-pudding model prove the existence of?
Electrons
Will every photon that strikes a metal surface be able to eject electrons?
NO, only photons with energy greater than the work function of the metal will be able to knock electron off.
Work function = the energy that holds electrons in the metal
What if the photons energy is a lot higher than the work function?
What does the symbol "n" represent in quantum numbers? what values are accepted?
The principle quantum number. It tells you which shell the electron is in. Positive integers (1,2,3,4...)
Ionization energy increases from left to right. True or False?
True
What happens when an electron absorbs or emits energy
Electron moves to a higher level, a photon is absorbed
Electron moves to a lower level, a photon is released
What did Millikan's oil-drop experiment help prove?
The charge of electrons
If more electron are striking the metal will electrons be ejected.
Only if they overcome the minimum threshold work function of the metal
What does the symbol "l" represent in quantum numbers? What values are accepted?
The angular momentum. It represents the subshell or shape of the orbital. (S=sphere, P=dumbbell, D= clover, F=Complex)
n-1 (if n is 3 it could be 0,1,or 2)
Atomic radius increases from top to bottom. True or False?
True
What does Bohr's atomic model state and what are its limitations?
Electrons can only have specific quantized energy values
It cannot account for spectra of multi electron atoms
Movement of atoms is not as Bohr suggested
Rutherford's gold foil experiment proved the existence of what 2 things?
Protons and the nucleus
What does the symbol 'ml' represent in quantum numbers? What values are accepted?
The magnetic quantum number. It tells you the orientation of the orbital within the subshell. (-l,0,+l)
if l=1 ml = -1,0,or +1
Ionization energy decreases from top to bottom. True or False?
True
What does the Heisenberg Uncertainty Principle State
That it is impossible to specify precisely and simultaneously the position and momentum of an electron
What did Chadwick's experiment on beryllium help prove the existence of?
Neutrons
What does the symbol "ms" represent in quantum numbers and what values are accepted?
The Spin quantum number. It tells you the direction of spinning for the electron. The values are either 1/2 or -1/2
Electron affinity and electronegativity increases from left to right. What's the exception?
The noble gases
What did Schrodinger's Atomic Model state differently than Bohr's
Electrons and other particles are treated as matter waves rather than particles
It also helps find the probability of finding a particle rather than its exact position
What are the 5 parts of Dalton's atomic theory?
1. All matter is made of atoms
2. all atoms of a given element are identical in mass and properties
3. Atoms of a given element are different from those of any other element
4. Compounds are combinations of two or more different types of atoms
5. A chemical reaction is a rearrangement of atoms
what is the Subshell electron capacity of Chlorine?
1s2 2s2 2p6 3s2