Chapter 1 Flashcards
Particles of Matter
What is matter?
anything that takes up space
What are Pure substances?
substances made up of one particle
Element
made up of one atom
Compound
made up of 2 or more atoms
mixture
2 or more pure substances
Homogeneous
uniform throughout, can’t see different components
Heterogeneous
able to see different components
How many grams in 1 kg?
1000 g
How many meters in 1 km?
1000 m
How many grams in 1 mg?
0.001 g
How many meters in 1 mm?
0.001 m
Atoms
smallest unit of an element
Molecules
2 or more atoms together
Physical properties
Observe without changing the identity of the substance
Chemical properties
the substance changes
Intensive properties
depends on the type of matter, not the amount
extensive properties
depends on the amount of matter in a sample
Solids
fixed shape and volume (molecules are packed together)
Liquids
No fixed shape, fixed volume
Gas
no fixed shape or volume (molecules are far apart)
Solid->Gas
Sublimation
Gas->Solid
Deposition
Solid->Liquid
Melting
Liquid->Solid
Freezing
Liquid->Gas
Vaporization
Gas->Liquid
Condensation
Precision
The closeness of 2 or more measurements to each other
Accuracy
How close a measurement is to the correct value
