smallest particle of an element
forms when two or more atoms bond together
a pure substance which can not be broken down by chemical means
a pure substance that forms when two or more elements chemically combine
change that does not give you new products, formulas dont change, reversible
produces different substances & dif properties, end up with something new, formulas change, irreversible
pure substances & mixtures
elements & compounds, only one kind of particle & altered by chemical chanve
solutions, suspensions & mechanical mixtures, more than one kind of particle & altered by phyiscal changs
looks same thru out, elements compounds & solutions
looks dif thru out, suspensions & mech mixtures
solvent mixed in a solution, form dissolve, seperate distill, alloy=mixture of metals
settles out, doesnt mix, solutions mix form ppt = suspensions, seperated bu filtered or centrifuge
doesnt mix, doesnt settle, picked apart or sieve
fixed density m.p & b.p
not fixed density m.p or b.p
principle stating that the proportion of elements in a specifc compound is a fixed quantity
Rf= d1/d2
sample line - top of colour or solvent
divide colour bu solvent
d1= solute/colour distance
d2= solvent distance