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lab chemistry

The Bohr Atom an e- orbits nucleus. the closest it is to it, it is at it's ground state. an e- absorbs E and jumps farthar from nucleus(excited state). the e- goes back to ground state emitting wavelength of light.
Rutherford... Did "Gold Foil Exper." Results-%98 went straight thru %2 deflected Suggest atom is mostly empty space, nucleus is dense filled w. pos particles.
J.J Thompson Determines mass to be 1/1,000 of a Hydrogen atom.
Aristotle said... Matter is composed of FOUR elements.... WATER, AIR, EARTH, FIRE.
Democritis said... Matter is composed of very small particles called atoms.
Law of Conservation is... matter is neither created nor destroyed.
Law of definite proportions is... every like chemical compound has the same ratio of elements.
Created by: breboox