Preap Chemical Formulas And Equations

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Unit   4   V ocabulary  
PreAp  
  C hemical   F ormulas   a nd   E quations  
 
1. Chemical   P roperties   -­‐  
a   p roperty   o r   b ehavior   o f   a   s ubstance  
when   i t   u ndergoes   a   c hemical   c hange   o r   r
eaction  
2. Matter   -­‐  
t he   s ubstance   o r   s ubstances   o f   w hich   a ny   p hysical  
object   c onsists   o r   i s   c
omposed  
3. Element   -­‐  
a   s ubstance   c onsisting   o f   a toms   w hich   a ll   h ave   t he  
same   n umber   o f   p
rotons  
4. Compound   -­‐
  a   s ubstance   f ormed   w hen   t wo   o r   m ore   e lements  
are   c hemically   b onded   t
ogether.    
5. Balanced   c hemical   e quation   –   t he   n umbers   o f   a toms   o f   e ach  
element   a re   e qual   i n   t he   p roduct(s)   a nd   r eactants   o f   a   c hemical  
equation  
6. Chemical   c hange   –   t he   f ormation   o f   a   n ew   s ubstance   w ith  
different   p roperties;   c annot   b e   u ndone   b y   p hysical   m eans  
7. Chemical   e quation   –   a   r epresentation   o f   a   c hemical   r eaction  
by   s ymbols   a nd   n umbers  
8. Chemical   f ormula   –   a   r epresentation   o f   a   s ubstance   i n   w hich  
the   e lements   a re   r epresented   b y   t heir   s ymbols   a nd   s ubscripts  
represent   t he   n umber   o f   a toms   o f   e ach   e lement  
9. Chemical   r eaction   –   a   c hange   c aused   b y   t he   i nteraction   o f   t wo  
or   m ore   s ubstances   ( reactants)   r esulting   i n   t he   f ormation   o f  
new   s ubstances   ( products)  
10.
Coefficient   –   t he   n umber   p laced   i n   f ront   o f   a   c hemical  
formula   i n   a   c hemical   e quation;   r epresents   t he   n umber   o f  
molecules   o f   t hat   s ubstance  
11.
Law   o f   c onservation   o f   m ass   –   m atter   i s   n ot   c reated   o r  
destroyed;   o nly   r earranged  
12.
Precipitate   –   t he   f ormation   o f   s olids   f rom   a   s olution  
13.
Product   –   s ubstance(s)   r esulting   f rom   a   c hemical   r eaction  
14.
Reactant   –   s ubstances   t hat   a re   c ombined   a nd   c hanged  
during   a   c hemical   r eaction  
15.
Subscript   –   t he   n umber   w ritten   t o   t he   r ight   a nd   s lightly  
below   a n   e lement   i n   a   c hemical   f ormula;   r epresents   t he  
number   o f   a toms   o f   a n   e lement   p resent   i n   a   c hemical   f ormula  
16.
Yield   –   t he   q uantity   o f   p roduct   f ormed   a s   a   r esult   o f   a  
chemical   r eaction  

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