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Definition
| total of mass and energy stay the same in any charge |
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Term
| law of multiple proportions |
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Definition
| when different compounds are formed by using the same elements, different masses combine in a particular whole number ratio. |
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Definition
atoms are made of indivisible particles
chemical reactions involve rearrangements of atoms
atoms of diff. elements combine to form compounds |
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Definition
all substance is made of 4 elemnts,
water earth fire wind |
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Term
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Definition
| smallest particle of an ELEMENT |
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Term
who made cathode ray tube?
what does tube do?
what is he known for ? |
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Definition
J.J thompson
air is pumped out
plum pudding model, discovered electrons |
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Term
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Definition
discovered postitive piece in center, nucleus
electrons would surround it
atom is empty |
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Term
| neutron is same mass as ... ? |
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Definition
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Term
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Definition
positively charged pieces
shot at florescent screen it glows
deflected by positive pieces. |
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Definition
| small volume, big mass and density |
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Definition
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Definition
protons +neutrons
account for most of mass |
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Term
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Definition
atoms of same element can have diff number of NEUTRONS
CHANGES mass number |
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Term
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Definition
| multiply atomic mass number (isotope) by percentage abundance then add them together |
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Definition
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Definition
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Definition
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Term
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Definition
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Term
| frequency is expressed in what units |
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Definition
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Term
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Definition
| speed of light=wavelength(frequency) |
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Term
| emission spectra or photoemission |
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Definition
| when light is given off by electron falling from high energy level to low energy level. |
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Term
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Definition
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Term
| equation to find wavelength |
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Definition
| frequency = wavelength (speed of light) |
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Term
| equation to find energy of photon |
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Definition
| E=planks constant (frequency) |
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Term
| model that only had hydrogens |
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Definition
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Term
| equation to find wavelength of a particle |
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Definition
| lambda = planks constant / mass(frequency) |
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Term
| Heisenburg uncertainty principle |
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Definition
| it is impossible to know exactly the location and velocity of a particle. |
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Term
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Definition
Planetery model
amount of energy sperate one level from another
move around like planets |
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Term
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Definition
| quna is the amount of energy needed to move energy levels |
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Definition
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Definition
like electron cloud
where you would find electron |
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Definition
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Term
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Definition
| electrons enter the lowest energy first |
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Term
| Pauli exclusion principle |
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Definition
| at most 1 electron per orbital- different spins |
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Term
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Definition
| when electrons occupy orbitals they cannot pair up until they have to |
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