Originally posted by unclebutcher:
im my experience of chionging o level tys and past yr exam papers i
dont recall having even [b]one question on which material
will become +ve and -ve. dont worry about it. i 99% will not come
out. just memorise it if you want.[/b]
true... its quite dumb to set this type of qn... who bothers w
which is positive or negative... if u consider frm which material
lose electrons more easily den becomes chemistry qn liao, beyond
level liao
ask ur teacher if need to noe this kind of stuff, if noe then LL
must memorise
