History
Who proposed the concept of the atom first?
Dalton
The general term for the movement of an electron from one energy level to another
transition
_________________ and ______________ proposed that an electron bound to a nucleus in an atom resembled a standing wave.
Schrödinger & Louis de Broglie
True or False.
When n=4, l=3 only.
False.
When n=4, l=3, 2, 1, 0.
Provide the full electron configuration of sulfur.
1s2 2s2 2p6 3s2 3p4
Who discovered the electron? What experiment did he use?
Thompson
Cathode Ray Tube
An electron continuously accelerating around the nucleus would
1) _____________
2) _____________
An electron continuously accelerating around the nucleus would
1) loose energy
2) collapse
True or False. It is impossible to know the speed and location of an electron.
True (Heisenberg Uncertainty Principle)
What are the numbers and names of the possible orbitals in n=3
l=2 (d orbital)
l=1 (p orbital)
l=0 (s opbital)
Provide shorthand electron configuration of cadmium
[Kr] 5s2 4d10
Who discovered the nucleus? What was his experiment?
Rutherford
Alpha particles onto gold foil gets deflected by dense nucleus
a)____________ discovered that there is a certain threshold for the b) ___________ of light is needed to get an electron to be emitted from the surface of a metal
a)Herts discovered that there is a certain threshold for the b) frequency of light is needed to get an electron to be emitted from the surface of a metal
Name/List the 4 quantum numbers.
Principal Quantum number "n"
Secondary Quantum number "l"
Magnetic Quantum Number "ml"
Spin Quantum Number "ms"
True or False.
Orbitals are filled in the following order:
1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p ...
False.
Orbitals are filled in the following order:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p ...
Provide shorthand electron configuration of arsenic
[Ar] 4s2 3d10 4p3
What was Millikan's experiment & discovery?
oil droplets to determine the mass of electrons
A unit or packet or energy
quantum
"No two electrons can have the same set of quantum numbers" is called ___________________________
True or False.
When l=3, ml can be -2
True
Provide the shorthand electron configuration of gold
[Xe] 6s1 4f14 5d10
Who discovered energy levels first?
What was his experiment?
Bohr
after analyzing the emission spectrum from hydrogen gas discharge tube
The classical theory of light failed to explain the ___________________________
radiation of black bodies
The theory that an atom is "built up" by addition of electrons, which fill orbitals starting at the lowest available energy orbital before filling higher energy orbitals
Aufbau Principle
True or False.
I should fill up the 2px before filling up the 2py
False.
We never pair up electrons in a subshell unless all orbitals in that subshell already have an electron. (Hund's rule)
Provide the electron configuration for Fe 2+.
[Ar] 3d6