Atom Flashcards
Wavelength
Shortest distance between equivalent points on a continuous wave.
Frequency
Number of waves that pass a given point per second
Amplitude
Height from rest position to crest or trough
Speed
Wavelength X Frequency
Speed of Light
3.00 X 10^8 m/s
Electromagnetic Spectrum
Forms of energy that exhibit wave-like behavior
Electromagnetic Spectrum Order
Radio, Micro, Infrared, Visible, Ultraviolet, X-Rays, Gamma Rays
1st to theorize the atom
Democritus
Gold Foil Experiment
Rutherford
Cathode Ray Tube Experiment
Thomson
Discovered the Electron
Thomson
Discovered the Nucleus
Rutherford
Discovered atom is mostly empty space
Rutherford
1st Atomic Model
BB Model (Looks like a BB bullet)
2nd Atomic Model
Plum Pudding Model (Looks like a chocolate chip cookie with the chips being electrons and the rest of the cookie being positive mass)
3rd Atomic Model
Rutherford Model (Blob of protons surrounded by a circle of electrons)
4th Atomic Model
Bohr Model (Protons and neutrons in middle surrounded by two layers of e-)
5th Atomic Model
Quantum Mechanics Model (Weird oval shapes one)
Discovered the neutron
James Chadwick
Discovered that electrons move in random orbital regions, also known as electron cloud
Erwin Schrodinger
Discovered Atomic Theory
Dalton
As Frequency and Energy increase…
Wavelength decreases
Long wavelength=
Low energy and low frequence
Shorter wavelength=
Higher energy and higher frequence
Closer to the left of the electromagnetic spectrum means
Higher in wavelength and lower in energy/frequency
