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33 Cards in this Set

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Who was the first person to coin the term atomos?
Democritus
What does atomos mean in English?
Unbreakable
Who was the first person to show experimental evidence that atoms existed?
Robert Boyle
Matter
Anything that has mass and occupies space
Atom
A particle that cannot be broken down, the basic unit of matter
Molecule
A particle made of atoms stuck together with chemical bonds
Element
A group of atoms (or sometimes molecules). All the atoms are identical (even within the molecules).
Compound
A group of molecules. All the molecules are identical. Within these molecules, there are more than 1 type of atm.
Pure Substance
A group of particles in which all the particles are identical
Mixture
A group of particles in which the particles are not identical
Homogenous mixture
A mixture that is the same throughout, uniform
Heterogeneous mixture
A mixture that is not the same throughout
Filtration: separation by...
Size
Distillation: separation by...
Boiling points
Settling: separation by...
Density
What is the difference between evaporation and boiling?
Evaporation is possible at many different temperatures and boiling only happens at a specific temperature.
Solid to liquid
Melting
Liquid to gas
Boiling
Gas to liquid
Condensation
Liquid to solid
Freezing
What causes atoms to speed up?
Heat
What phase is compressible?
Gas phase.
What phase is the densest?
Solid
What phase has no definite shape?
Liquid and gas
What phase fills the container?
Gas
4 indications of chemical change
Color change
Producing gas
Precipitation
Release of heat or light
Physical Property
Characteristics of substances that differentiate them from one another.
Chemical Property
Substances react with one another and transforms the substances.
Physical Change
Physical properties have changed but the chemical composition remains the same.
Chemical Change
When chemical bonds are broken or formed.
Physical changes are reversible.

True or false.
True
Heat
It's the energy of moving particles
Explain how the compressibility of gases supports the belief that matter is made out of atoms.
If there was no empty space, compressing gas would not be possible