Section 1: Physical and Chemical Properties Flashcards
solid to gas
sublimation
gas to solid
deposition
liquid to gas
evaporation
gas to liquid
condensation
physical properties
describes physical appearance/composition
- colour, melting/boiling point
- malleability, ductility, conductivity
malleability
how flexible it is
ductility
can it be stretched into wires
conductivity
will it carry an electrical current?
chemical properties
how a substance interacts with others
seen only with chemical reactions
- salt reacts with water, air, iron to make rust
physical change
change of states
dissolving
deformation
chemical bonds aren’t broken
chemical change
leads to new substances
chemical bonds are broken and new bonds are made
pure substance
only one kind of particle, unique properties
elements
can’t be broken down any simpler
found in periodic table
- carbon, nitrogen, hydrogen, helium
compounds
2+ elements combined chemically
unique properties
- water = hydrogen + oxygen
- sugar=carbon, hydrogen, oxygen
mixture
combo. of pure substances - each substance remains in its pure form
mechanical mixture
(hetero or homo?)
heterogeneous
diff. particles are visible
- soil, trail mix
solution
(hetero or homo?)
homogeneous
multiple substances are dissolved making it look like one substance
- pen ink, cool aid, tap water,
suspension
one substance is held within the other
cloudy
- tomato juice
colloid
particles are so small that they cant be separated easily
- ketchup and milk
physical change
usually easily reversible
chem. bonds not broken (ice and water r still H20)
chemical change
creates new substance
chem. bonds are broken and reformed to something new
new materials have diff. properties
difficult to reverse (it at all)
physical change clues
change of state, dissolving, or deformation
chemical change clues
change in color
change in odour
formation of a precipitate (SOLID)
heat/light produced
gas is made (bubbles, fizz is proof)
