compounds and mixtures
February 07, 2020
Necessary characteristics
• 2 or more elements combined
chemically
• new substances formed with new
properties
• chemical change occurs to form a
Characteristics not
necessary
• Certain color, taste, shape
• Certain state: solid, liquid,
gas
NaCl
compound Na + Cl
• broken down by heat, light, electricity
• certain chemical formula
(H2O H2O2
CO2 CO)
examples
C12H22O11 sugar
Fe2O3 rust
NaCl salt
SiO2 sand
CO2
Compounds
not examples
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•
•
•
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elements
mixtures: saltwater,soil
air­ mixture of gases
alloys­ mixture of metals
energy
1
compounds and mixtures
February 07, 2020
Compound : 2 or more elements combined chemically
that can be separated by heat, light, or electricity.
Physical Ways of Separation
filter, sort, strain, sift, dissolve, boil, condense, evaporate
mixture : two or more substances combined physically, but
not joined chemically, that can be separated physically
mixture : any amount of each substance. Has no set
proportion or ratio.
compounds : have a certain formula
H2O H2O2 CO2 CO
2