chemistry

2.  All matter is made up of particles
 Three types of particles that make up most
matter are atoms, molecules and ions.
 Atom: smallest particle that cannot be broken
down by chemical means
 Molecule: particle of two or more atoms
joined together
 Ion: atom or group of atoms that carries an
electrical charge.

3. solid liquid gas
arrangement Fixed
pattern
No fixed
pattern
random
movement Only vibrate Slide past
each other
Move
everywhere
rapidly
proximity Close
together
Close
together
Far apart

5.  When a solid is heated, its particles gain
energy and vibrate more vigorously.
 Forces of attraction between solid particles
are weakened and the solid melts.
 Heating to a higher temperature weakens
these forces further and the liquid turns into
a gas.