Modules 1-7

Chemistry
study of properties of matter and how they change
Homogeneous Mixture
substances are evenly distributed throughout the mixture and you cannot see the different parts
Heterogeneous Mixture
substances are not evenly distributed throughout the mixture and you can see the different parts of the mixture
Density
Mass/Volume
Solid
has definite shape and volume, particles are tightly packed together in a fixed position
Liquid
has a definite volume, but no definite shape (takes the shape of its container). Particles are moving freely, but close together
Gas
no definite volume or shape, the particles move to occupy the space of the entire container, they are moving very fast are spread out. Undergoes a change in volume most easily (squeezes together in small container or fills large one)
Vaporization
liquid to gas
Condensation
gas to liquid
Freezing
liquid to solid
Group
a column (the things up and down) in the periodic table. Elements in the same group tend to have the same properties. These are also called “families”.
Hund’s Rule
the most stable arrangement of electrons occurs when they’re all unpaired.
Proton
positive charged ion
Neutron
no charge ion
Electron
negative charged ion
Orbital
this is where the electrons in an atom live.
Phase Diagram
a chart which shows how the phase depends on various conditions of temperature and pressure.
STP
standard temperature and pressure
Supersaturated
when more solute is dissolved in a liquid than is theoretically possible. This doesn’t happen much, as you might imagine.
Triple Point
the temperature and pressure at which all three states of a substance can exist in equilibrium.
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