meaning of ore
naturally occurring rock or mineral from which a metal or valuable substance can be profitably extracted.
what is LCA
life cycle assessment is a process carried out for every product to asses the environmentally friendly impact
OILRIG
oxidation is loss
reduction is gain
if an atom gains oxygen
it becomes oxidised because it gains
if an atom reduces in oxygen
its reduction because its loss
what does corrosion mean
a metal is corroded when reacting with oxygen (not rusted)
rusting
ONLY APPLIES TO IRON and requires water
what metals are extracted by electrolysis
-potassium
-sodium
-calcium
-magnesium
-aluminium
metals that heat with carbon
-zinc
-iron
-copper
pen table
mass charge location
p 1 +1 nucleus
e 0a -1 shells
n 1 0 nucleus
what happens to an negative electron in covalent bonding
becomes positive
what determines the number of electrons on the outer shell
group number
equation for moles
mass over molar mass
