memorise
tables in book
Reactions with chlorine
Metals (Na,Mg,Al) react vigourously
Si reacts slowly
Phosphorus reactsslow in excess Cl gas
Ar doesnt form chlorides
P3 oxides oxidation states
all positive cuz O has a higher EN than any P3 element
amphoteric
can act as acid or base
P3 oxides acid/base nature
metals -basic
Al2O3 -amphoteric
nonmetals- acidic
periodicity
study of trends of different parts of the periodic table