Histroy Of Chem Flashcards
Robert Boyle
boyles law
boyles law
the pressure and volume of a gass have an inverse relationship when temp. is held constant
Joseph Priestley
▪ turned mercury oxide (HgO) into oxygen and another product
▪discovered oxygen and carbon monoxide
Antoine Lavoisier
▪combustion reaction
▪law of mass conservation
law of mass conservation
mass is neither created nor destroyed in chemical reactions
joseph proust
▪lae of definite proportions
law of definite proportions
different samole of pure chemical conpounds always contain the samd proportion of elements by mass
John Dalton
▪law of multiple proportions
▪daltons atomic theory
law of multiple proportions
▪elements can comvine in different proportions
▪ex: NO NO2
daltons atomic theory
- elememts are made if atoms
- each element is characterized by the mass if its atoms
- chemical combination of elements to make conpunds occurs when stoms bond together
- chemical reactions only rearrange how atoms are combined
thomas young
▪double slit expirement
▪electons behave as both a particle and a wave
J. J. Thomson
▪cathode ray experiment
▪proved electrons were negitively charged
▪charge to mass ratio
Robert A. Millikan
▪oil drop experiment
▪determined charge of a single electron
▪threw out data
Ernest Rutherford
▪gold foil experiment
▪nucleus is composed of protons
▪nucleus is very small compared to atom
▪atoms mostly empty space
James Chadwick
▪discovered neutron existence and mass
▪newtons second law
wavelength
distence and peaks or troughs of a wave
frequency
of complete waves (occilations) that pass per unit of time
amplitude
vertical diatence between the middle if a wave and the top of its peak
list categories of light from shortest wavelength to longest
▪gamma ▪x-ray ▪uv ▪visible ▪infared ▪microwave ▪radio frequency
Wilhelm Wien
▪Wiens law
wiens law
wavelength and color can be correlated with temp.
Lord Baron Raleigh and James Jeans
▪ultaviolet catastrophe
▪black body radiation
black body radiation
electromagnetic radiation emitted from a heated object
max planck
▪energy is released in bundles which is an integer multiple of hv
▪plancks constant
plancks constant links
the amount of light a photon carries eith the frequency of its wave
Einstein
▪ light behaves like a stream of particles
▪ photoelectric effect
▪binding energy for electrons
Louis de broglie
▪coined term photon
▪de broglies equation (mass associated w/ a proton)
joseph von fraunhofer
▪saw black lines in electromagnetic spectrum
▪discovered helium
Johann balmer
▪ rydberg equation (gives wavelength of photon emmitted)
neils bohr
▪electron can jump between orbits
▪bohrs equation. (orbital energies)
▪
ground state
n=1
ionization energy
the minimum energy required to remove an electron from the nth state of an atom
erwin schrodinger
▪quantum mechanical model
▪wave function
▪equation for the probability of finding an electron in a small space
Ψ^2
probability of finding an atom in a small space
Werner heisenberg
▪Heisenberg equation (uncertainty in position or speed)
▪uncertainty principle
photoelectric effect equation
Ephoton = Ebinding + kinetic energy electron
