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32 Cards in this Set

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Isotopes
*the atomic mass is different for each isotopes of the same element
*not all elements have isotopes
Ions
noble gases- theit outer shell is full
group 1- all elements have just one element have just one electron in outer valance
planets
sun, mercury, venus, earth, mars, jupiter, saturn, uranus, neputune, pluto
Thompson's theory
*all atom's contain proton's and electrons
*all protons(+)are the same as all electrons(-)
*e- and p+ are different from each other
Bhor
*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
proton
P+(symbol)
1(mass)
nucleus(location)
positive(charge)
crookes discovery
figured out that the cathode rays must have mass as well as motion
describe a lab report write up
title page
purpose
materials
procedure
observations
conclusion
define hypothesis
prediction
a well educated guess about what will happen in the investagation
stated as an "if" or "then" statement
define an independent variable
the thing in the experament that the scientist changes
define dependent variable
the thing in the experiment that is being investagated
define controlled variable
the things in the experiment that the scientist could change but choses not to
define quantitative
involving measurement(use of tools) E.I. temperature, time, mass, volume
define qualitative
colour, shape, feel, smell, subjective
significant digites
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
signifacant notation
3.00 x 10^8 = 3000000000.0
density
G R A S P

D=M/V
V=M/D
M=DV
physical change
does not change the chemical properties - still combustable, toxic, reactive
chemical change
will effect the physical properties as a new substances are made with their own unique properties
matter
*all matter has unique properties
*some properties are physical and some are chemical
matter chart
matter
mixtures pure substance
mech----solutions
ordinary---alloy

hetrogeneous homogeneous

ord mech---suspen---colliods

(pure substances and solutions are homo)
hetrogeneous
random arangements of paticles
homogeneous
uniformily aranged particles
mechanical mixtures
random scattering of particles
ordinary
large particles- seen
colliod
particles are really tiny - stay
suspension
particles seperate into phases
alkali metals
group A
very reactive
under- go chemical change
Li
Na
Rb
Cs
Fr
Alkaline Earth Metals
calcium
all come out of the earth's crust
pretty reactive(not as reactive as alkali)
halogens
all toxic
F
Cl
Br
I
noble gases
they don't react at all
He
Ne
Ar
Kr
Ve
Rn
8a or 18
Dalton's Atomic Theroy
*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