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What is Matter?
Anything with mass and volume.
The types and amounts of simpler substances that make it up
What are physical properties?
Characteristics a substance shows by itself, without changing into or interacting with another substance.
Melting point, electrical conductivity, and density are examples of what type of property?
Define physical change.
When a substance alters its physical properties, not its composition.
What are chemical properties?
Characteristics a substance shows as it changes into or interacts with another substance.
Flammability, corrosiveness, and reactivity with acids are examples of what type of property?
Define Chemical change (also called Chemical reaction.)
When a substance is converted into a different substance.
Herp da derp, What are the three physical states? Define them.
- SolidFixed shape that does not conform to the container shape.
- Varying shape that conforms to container shape, but only to the extent of the liquid's volume; has an upper surface.
- Has a varying shape that conforms to the container, but fills the container, without any surfaces.
Define the atomic scale states of matter (IE relative position of particles.)
- The particles lie close to each other in a regular, three-dimensional arrayLiquid
- Particles lie close to each other, but move randomly around each other.
- Particles have large distances between them and move randomly throughout the container.
What is a general theme of chemistry?
Macroscopic-scale properties and behavior, those we can see, are results of atomic-scale properties and behavior we can't see.
Le ability to do le work
- Energy in motion
- Energy of position
What are the steps of the scientific method?
- Observations- data, often summarized in mathematical terms, as natural law.
- Hypothesis- proposal to explain an observation.
- Experiment- procedure to test a hypothesis.
- Model- Simplified, not exact, representation of some aspect of nature we use to predict related phenomena.
What are the SI Units for:
Amount of substance
- Mass- Kilogram (kg)
- Length- meter(m)
- Time- second(s)
- Temperature- Kelvin(K) [no degree sign]
- Electric Current- Ampere(A)
- Amount- Mole(mol)
- Luminous intensity- Candela(cd)
- Volume- cubic meter(m3) [chemists use Liter(L) and milliliter (mL)]
What is an angstrom?
- An old unit still sometimes used:
- 1Å= 10-10 m = .1nm = 100pm
What is the difference between temperature and heat?
- Temperature (T): measure of how hot or cold one object is relative to another.
- Heat: the energy that flows from the object with the higher temperature to the object with a lower temperature.
Convert from Kelvin to Celsius and vice versa.
0K = -273.15°C
0°C = 273.15K
Convert from Celsius to Fahrenheit.
Convert from Fahrenheit to Celsius.