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32 Cards in this Set
- Front
- Back
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Isotopes
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*the atomic mass is different for each isotopes of the same element
*not all elements have isotopes |
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Ions
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noble gases- theit outer shell is full
group 1- all elements have just one element have just one electron in outer valance |
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planets
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sun, mercury, venus, earth, mars, jupiter, saturn, uranus, neputune, pluto
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Thompson's theory
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*all atom's contain proton's and electrons
*all protons(+)are the same as all electrons(-) *e- and p+ are different from each other |
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Bhor
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*electrons are like the plants and protons are like te sun
*don't crash into nucleus *closer the orbit the less energy electron's carry |
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proton
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P+(symbol)
1(mass) nucleus(location) positive(charge) |
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crookes discovery
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figured out that the cathode rays must have mass as well as motion
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describe a lab report write up
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title page
purpose materials procedure observations conclusion |
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define hypothesis
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prediction
a well educated guess about what will happen in the investagation stated as an "if" or "then" statement |
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define an independent variable
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the thing in the experament that the scientist changes
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define dependent variable
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the thing in the experiment that is being investagated
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define controlled variable
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the things in the experiment that the scientist could change but choses not to
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define quantitative
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involving measurement(use of tools) E.I. temperature, time, mass, volume
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define qualitative
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colour, shape, feel, smell, subjective
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significant digites
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all digits except lead zero's are significant. 0.0001
ingnore the decimal place 307.0 = SD-4 61= SD-2 0.03 = SD-1 0.5060 = SD-4 |
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signifacant notation
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3.00 x 10^8 = 3000000000.0
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density
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G R A S P
D=M/V V=M/D M=DV |
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physical change
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does not change the chemical properties - still combustable, toxic, reactive
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chemical change
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will effect the physical properties as a new substances are made with their own unique properties
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matter
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*all matter has unique properties
*some properties are physical and some are chemical |
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matter chart
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matter
mixtures pure substance mech----solutions ordinary---alloy hetrogeneous homogeneous ord mech---suspen---colliods (pure substances and solutions are homo) |
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hetrogeneous
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random arangements of paticles
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homogeneous
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uniformily aranged particles
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mechanical mixtures
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random scattering of particles
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ordinary
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large particles- seen
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colliod
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particles are really tiny - stay
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suspension
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particles seperate into phases
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alkali metals
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group A
very reactive under- go chemical change Li Na Rb Cs Fr |
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Alkaline Earth Metals
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calcium
all come out of the earth's crust pretty reactive(not as reactive as alkali) |
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halogens
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all toxic
F Cl Br I |
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noble gases
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they don't react at all
He Ne Ar Kr Ve Rn 8a or 18 |
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Dalton's Atomic Theroy
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*unique atoms make up all particles
*atoms behave as particles *have unique properties mass and size *definite proportions of atoms in each compound *chemical properties easier to understand |
