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37 Cards in this Set

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Mass
&
Weight
is the measure of the quantity of matter in an object.
is a measure of the force of gravity upon an object.
Quantity
force
Accuracy
&
Percision
is how close a measurement is the the actual exact value

has to do with the consistency or reroducibility of a measurment.
3 states of matter
solid, liquid and gas
With state of matter has the least amount of kinetic energy?
Solid
Substance
is a class of matter that is homeganeous of definite compostion has unique properties. May eather be an element or a compound.
Element
is a substance that can not be decomposed tinto similer substances
Compound
a substance that can be decomposed by cemical means to a different substance.
Law of definite composition
the ratios of the masses of each element in a gavin compound are always the same.
Atom
the smallest part of an element that remains the characteristic of the element.
Molecules
a group of 2 or more atoms that are linked togeather by cemical compounds bonds
pure substance
a class of matter that is homogeneos of definite composion, and has it's own unique properties which make it different from other substances.
Mixture
2 or more elements or compounds that are phisically mixed but not cemically combined.
Hetergeneous
has multiple phases
homogeneous
has one phase
the 4 signs of cemical change.
* formations of a gass
* formation of a precipitation
* liberation of absorbtion of heat, light or some other form of energy.
* a distinct change in color
Atomic number
is the number of protians in the nucieus. All atoms of the same element have the same number of protons hence the same atomic number.
Mass number
is the sum of the number of protons and nutrons in the nuclieus.
Isotoopes
are atoms of the same element that differ in there mass number.
ion
atoms or molecules that have a different number of electrons then protons.
anion
an ion has nore electrons then protons the ion has a negative charge. (-)
cation
if the ion has fewer electrons then protons there is a posative charge. (+)
Atomic Mass is measured in what?
Atomic mass units or (U)
draw a table
Element-Z-A-N-ELECTRONS
-Electrical CHARGE
z=
atomic #
A=
Mass #
prefix 1
mono
prefix 2
di
prefix 3
tri
prefix 4
tetra
prefix 5
penta
prefix 6
hexa
prefix 7
hepta
prefix 8
octa
prefix 9
nova
prefix 10
deca
a=
z+n
n=
a-z