Substances
Mixtures
The Properties
States of Matter
Grab Bag
100
What is an element?
The simplest kind of matter
100
What is a mixture?
A physical blend of at least two substances
100
Define physical properties.
a property that can be observed and measured without chemical reactions.
100
What are the 3 states of matter?
Solid, Liquid, Gas
100
Do compounds or mixtures have definite composition?
Compounds always come in set compositions
200
What is a compound?
Two or more elements, chemically combined
200
What are the two different types of mixtures?
Homogeneous and Heterogeneous
200
Define chemical properties.
a property that can only be observed through a chemical reaction.
200
Order the 3 states of matter from slowest to fastest particle speed
Solid -> Liquid -> Gas
200
List 5 ways that you can recognize a chemical change
1) Energy change
2) Color change
3) Formation of precipitate
4) Irreversibility
5) Gas production
300
Give an example of a chemical compound
H2O, CO2, CH4, etc.
300
Define heterogeneous mixture and give an example
A mixture that is not uniform in composition
EX: Salad, Soil, Cereal
300
Give an example of a physical property.
color, hardness, m.p., b.p.
300
Describe the shape and volume of both a gas and a liquid
Gas- No definite volume or shape
Liquid - No shape, but definite volume
300
Molten lava pours from a volcano in Hawaii. After a few hours, the liquid lava hardens into a shiny gray rock. Which phase change has taken place?
Freezing
400
How many elements are there in the world?
118
400
Define homogeneous mixture and give an example
A composition that is uniform/same throughout
EX: Saltwater, lemonade, coffee
400
What is an intensive property? Give an example
A property that does not depend on the amount of matter present
EX: Density, m.p., b.p., color
400
"Sweat" on your gatorade bottle on a hot day is an example of what phase change? One word answer
Condensation
400
Heterogeneous or Homogeneous?
Heterogeneous
500
How many elements are naturally occurring and how many were found in a lab?
98 naturally occurring elements and 20 elements were discovered in a lab
500
Is this is a homogeneous or heterogeneous mixture? Explain.
Heterogeneous. The cookie is not the same throughout
500
What is an extensive property? Give an example
A property that depends on the amount of matter in the sample
EX: Mass, Volume, Length
500
What is the name of the phase change from Liquid to Gas
Evaporation
500
What was this guys name?
Louis Slotin