Exambusters Chemistry Study Cards 2

Physical Change
Substance changes form or state only. e.g. boiling, melting, freezing, dissolving, grinding, cutting
Chemical Change
New substances are formed with new chemical and physical properties. e.g. oxygen and hydrogen form water, sodium and chlorine form salt (sodium chloride)
List the three states of matter in order of increasing density.
gas: neither definite shape nor volume
liquid: definite volume; takes shape of container
solid: definite size and shape
Name for:
Fe
Iron
Name for:
Co
Cobalt
Name for:
Ni
Nickel
Name for:
Cu
Copper
Name for:
Zn
Zinc
Identify as element, compound, or mixture:
sand
mixture
Identify as element, compound, or mixture:
air
mixture
Identify as element, compound, or mixture:
gold
element
Identify as element, compound, or mixture:
water
compound
Identify as element, compound, or mixture:
salt
compound
Identify as element, compound, or mixture:
hydrogen
element
Physical Properties
Properties which can be observed without altering the substance. e.g. color, odor, hardness, density, luster, state, conductivity, solubility, boiling point and melting point
Chemical Properties
Observed when a substance changes into a new substance. e.g. Iron forms rust in air and water; gasoline burns in oxygen.
Name for:
C
Carbon
Name for:
Si
Silicon
Name for:
N
Nitrogen
Name for:
P
Phosphorus
Name for:
O
Oxygen
Einstein’s Law of Conservation of Mass-Energy
E=mc2 The sum-total of mass and energy remains constant in a reaction, but mass and energy may be interconverted.
Symbol for:
sulfur
S
Symbol for:
chlorine
Cl
Symbol for:
iodine
I
Symbol for:
fluorine
F
Symbol for:
bromine
Br
Symbol for:
silver
Ag
Symbol for:
gold
Au
Symbol for:
mercury
Hg
Symbol for:
aluminum
Al
Symbol for:
lead
Pb
phase
A sharply defined, uniform region in a mixture. e.g. oil and vinegar in salad dressing; ice and water in a frozen pond
Name for:
He
Helium
Name for:
Ne
Neon
Name for:
Ar
Argon
Name for:
Kr
Krypton
Name for:
U
Uranium
Density
mass/volume

units: g/mL g/L kg/L

Calculate the density of a rock with mass = 10 g, and volume = 5 mL
2 g/mL
element
A substance composed of identical atoms. e.g. gold, silver, oxygen, hydrogen, lead, chlorine, helium, iron, copper, fluorine, arsenic
compound
Substance composed of two or more different elements chemically combined. e.g.
water, H2O
salt, NaCl
sugar, C6H12O6
ammonia, NH3
mixture
A combination of substances held together by physical means. e.g. dirt, milk, soup, saltwater, granite
homogeneous mixture
Uniform in composition. e.g. air, metal alloy, salt, water
heterogeneous mixture
Not uniform in composition. e.g. spaghetti sauce, salad
Symbol for:
barium
Ba
Symbol for:
beryllium
Be
Symbol for:
platinum
Pt
Symbol for:
arsenic
Ar
Symbol for:
tin
Sn
Symbol for:
sodium
Na
Symbol for:
potassium
K
Symbol for:
calcium
Ca
Symbol for:
hydrogen
H
Symbol for:
magnesium
Mg
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