name the 8 diatomic elements:

boron, carbon, nitrogen, oxygen, fluorine, chlorine, bromine, iodine

the 5 main points of particle theory:

P all matter is made of particles

I the particles in a given substance are identical

S there are spaces between the particles

A the particles attract one another

M the particles are moving (and when heat is added, they move more)

solid to gas

sublimation

gas to solid

deposition

liquid to gas

evaporation

gas to liquid

condensation

liquid to solid

freezing

solid to liquid

melting

what is an element?

simplest form

cannot be broken down

on periodic table

one phase

compounds

made of 2 or more elements

can be broken down chemically

one phase

homogeneous mixture (solution)

looks like one substance (one phase)

heterogeneous/mechanical mixtures

can see the parts (more than one phase)

examples of physical properties:

state

colour

clarity

luster

viscosity