Atomic History
Experiments
P+, N0, E-
Orbital Diagrams
Quantum Number
100
The first person to mentions atoms; "atomos"
Who is Democritus?
100
negative, based on the negative end of a magnet repelling the beam in the Cathode Ray Tube Experiment
What is the charge (+/-) of an electron?
100
positive subatomic particle
What is a proton?
100
electrons
What subatomic particles are we organizing in an electron orbital diagram
100
Describes the spin of an electron
What is the magnetic spin, ms
200
First Atomic Theory
What did John Dalton contribute to atomic history?
200
this experiment used varying voltage and charged plates to suspend/slow down a particle. Results yielded exact charge and size of an electron.
What is the oil drop experiment?
200
protons and neutrons
What two subatomic particles make up the atomic mass?
200
states that you must fill in lowest energy levels first
What is the Aufbau principle?
200
s,p,d,f
What are the shapes of electron orbitals?
They are: s- sphere, dumbell, cloverleaf, complex
300
This model was developed after JJ Thomson's Cathode Ray Tube Experiment.
What is the Plum Pudding Model?
300
The gold foil experiment established two things about the structure of an atom:
(1) atoms are mostly empty space
(2) atoms have a compact, positive nucleus
300
same number of protons, different number of neutrons
What is an isotope?
300
says that each sublevel must be filled with at least one electron before doubling them up
What is Hund's rule? (bus rule counts)
300
Magnetic quantum number ml
What quantum number describes the number and orientation of an orbital?
400
discovered neutrons experimentally in 1932
Who is James Chadwick?
400
alpha particles bouncing off of the gold foil
What evidence supports atoms having a positive, compact nucleus?
400
atom with 13 protons
What is Aluminum?
400
Pauli Exclusion Principle says that no two electrons can have the exact same quantum numbers, so ...
Why must electron pairs have opposite spins?
400
if n=2, what can l be?
l = 0, 1
500
disproved the Bohr's model of the atom; gives probability for finding an electron in an orbital around the nucleus; quantum numbers
What are the solutions to the wave equation?
500
neutral charged particles bombard the proton-heavy paraffin wax and release a positively charged particle
What is the Beryllium Bombardment Experiment?
500
20 neutrons and 19 protons
What is Potassium?
500
What is the orbital diagram for Carbon?
500
If l = 2, what are the values of ml ?
ml = -2, -1, 0, 1, 2