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Chemistry Final Revi

natural law studies of innumerable chemical changes have shown that the total mass of the materials involved is the same before and after that change
theory a tested hypothesis, gives an overall explanation of some part of nature
mega 1,000,000= 10 to the 6
kilo 1000= 10 to the 3
deci 0.1= 10 the the -1
centi 0.01= 10 to the -2
milli 0.001= 10 to the -3
liter 1000 mL
milliliter 1/1000 L= 10 the the -3 = 1 L
dalton's atomic theory elements are made of tiny particles called atoms, all atoms of a given element are identical (later disproven) atoms of a given element are different from any other atoms of another element atoms can combine w/ atoms atoms are indivisible in chemical pro
J.J. Thomson atoms of any element can be made to emit tiny negative particles, there must also be postively charged particles
William Thomson (Lord Kelvin) plum pudding model, pudding of positive charge w/ negative electrons scattered around
Ernest Rutherford alpha particles, metal foil experiment some a particles were deflected, plum pudding model had to be incorrect. center of concentrated positive charge, named them protons
James Chadwick nuclei contain a neutral partical he named it neutron, which is slightly more massive than a proton but has no charge
covalent bond a type of bonding in which atoms share electrons
Created by: popis8