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31 Cards in this Set

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CHEMISTRY
STUDY OF COMPOSITION, STRUCTURE & PROPERTIES OF MATTER & OF CHANGES THAT OCCUR IN MATTER
MATTER
HAS MASS & OCCUPIES SPACE
MASS
QUANTITY OF MATTER IN AN OBJECT
ATOMS
SMALLEST UNITS OF MATTER
SUBATOMIC
SMALLER THAN AN ATOM
MOLECULES
2 OR MORE ATOMS JOINED TOGETHER
COMPOSITION
TYPES OF ATOMS & THE RELATIVE PROPORTIONS OF DIFFERENT ATOMS IN A SAMPLE OF MATTER
PHYSICAL PROPERTIES
EX: COLOR, ODOR. A CHARACTERIESTIC OF MATTER DISPLAYED W/O HAVING TO CHANGE ITS COMPOSITION.
CHEMICAL PROPERTIES
A CHARACTERISTIC THAT MATTER DISPLAYS AS IT UNDERGOES A CHANGE IN COMPOSITION.
PHYSICAL CHANGE
MACROSCOPIC CHANGE BUT NO CHANGE IN COMPOSITION. EX: ICE TO WATER
CHEMICAL CHANGE/REACTION
CHANGE IN COMPOSITION AND OR CHANGE IN STRUCTURE OF MOLECULES. MAY ALSO PRODUCE MACROSCOPIC CHANGE.
SUBSTANCE
HAS A FIXED COMPOSITION
ELEMENT
-CANNOT BE BROKEN DOWN
-ONE TYPE OF ATOM
COMPOUND
-MADE UP OF ATOMS OF TWO OR MORE ELEMENTS.
-THE DIFFERENT ATOMS ARE COMBINED IN FIXED PROPORTIONS
MIXTURE
-NO FIXED COMPOSITION
-HOMOGENOUS & HETEROGENOUS
HOMOGENOUS
AKA: SOLUTION - SAME COMPOSITION & PROPERTIES THROUGHOUT SAMPLE
HETEROGENOUS
VARIES IN COMPOSITION OR PROPERTIES FROM ONE PART OF THE MIXTURE TO ANOTHER PART OF THE MIXTURE
SCIENTIFIC LAWS
PATTERNS SUMMARIZED IN BRIEF STATEMENTS
SCIENTIFIC THEORIES
EXPLANATIONS
CELCIUS TO FARENHEIT
TF = 1.8(TC) + 32
FARENHEIT TO CELCIUS
TC = TF - 32 / 1.8
CONVERSION FACTOR
DESIRED QTY & UNIT = GIVEN QTY & UNIT X CONVERSTION FACTOR
*DESIRED UNIT GOES IN NUM
/
UNIT TO BE CONVERTED GOES IN DENOMINATOR
DENSITY FORMULA
d = m/V
SUBATOMIC PARTICLES
PROTON p+
NEUTRON n 0
ELECTRON e-
ATOMIC #
# OF PROTONS IN AN ELEMENT. THE NUMBER OF PROTONS IS WHAT IDENTIFIES THE ELEMENT.
REPRESENTED BY (Z)
ISOTOPES
*ATOMS W/ THE SAME # OF p+ BUT DIFFERENT # OF e-.
* SAME ATOMIC #; DIFFERENT MASS
*COMMONLY WRITTEN WITH ELEMENT FOLLOWED BY THE MASS #.
MASS#
PROTONS & NEUTRONS.
REPRESENTED BY (A)
NEUTRON FORMULA
A-Z
CHEMICAL SYMBOL FOR ISOTOPE
A -> MASS# (WRITTEN AS SUPERSCRIPT) TOP LEFT HAND CORNER OF E (ELEMENT). Z-> (WRITTEN AS SUBSCRIPT) BOTTOM LEFT HAND CORNER OF E.
ATOMIC MASS UNIT
1/12 THE MASS OF A CARBON 12 ATOM.

*1u = 1.66054 X 10 (RAISED TO THE POWER OF -24) g
TO OBTAIN AVERAGE ATOMIC MASS
CONTRIBUTION OF ISOTOPE = FRACTION ABUNDANCE X MASS OF ISOTOPE