Chapter 1 Flashcards
(27 cards)
Antoine Lavoisier
Conservation of mass
Joseph Proust
Constant composition and definite proportions
John Dalton
Said the atom was like a ball
J. J. Thomson
Cathode ray tube experiment to find q/m; discovered electron
Robert Milikan
Oil drop suspension
Ernest Rutherford
Gold foil experiment with alpha particles; discovered nucleus
Neil’s Bohr
Quantized angular momentum to build rudimentary model of atom; led to discrete orbitals
James Chadwick
Added neutrons
Physical property
Measured without changing state
Chemical property
Can only be measured through changing the state
Signs of chemical change
Color change, formation of gas, formation of precipitate, release of heat/light
Example of light as wave
Double-slit experiment
Example of light as a particle
Photoelectric effect
Example of matter as a particle
Classical mechanics
Example of matter as a wave
Double-slit experiment
Quantization before quantum
Matter (black-body), light (photoelectric effect), and angular momentum (Bohr model)
Equation for radial nodes
n - l - 1
Equation for angular nodes
l
Berzelius
Accurately measured atomic masses of most elements
Dobereiner
Developed law of triads
Newlands
Developed law of octaves
Mendeleev
Developed periodic table arranged by atomic mass
Mosely
Rearranged period table by atomic number
Atomic radius
Decreases across period and increases down group
