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neh the question is open to everybody...

how are electrons able to obtain specific energy levels? even though they're all orbiting the nucleus at equal distances. and also refering to this what makes a valence electron, a valence electron?

hey i thought bromine was an element that was liquid at toom temperature anyway. like mercury could you also use just Br2 to test for alkenes or is it just HBr

is it when the plane of the detector loop is parallel or perpendicular to the plane of the transmitter. jacaranda says that its max when theyre parallel and cambridge says theyre max when theyre perpendicular. i dunno which to trust and i dont really get it either, could someone explain...

yeah cool thanks man i get it now

wait lemi ask again is the long thing the positive terminal aka the.......cathode?

oh alright pkc i see what youre saying. so is the long thing still the positive terminal? and teh arrow that i drew, is that the direction of the conventional current then? i know this is prelim stuff. im screwed

so the electrons dont actually enter the metal from the solution as you say pkc sorry and fuck this i think we're all just confusing eachother i'll post an answer when i get one from a teacher or something.

mkay but say you have a zinc ANODE. the zinc unergoes a reaction Zn(s) -> Zn2+ + 2e so from this, it's actually the anode itself thats oxidising and causing the flow of electrons. the electrons dont come from the solution because.. the solution doesnt consist of solid atoms to electrons to...

can someone tell me something now. ( i attached something)can someone correct me the longer line of the cell in the circuit is the positive terminal. which is i assume the anode yeah? because the anode is the positive electrode. but is it the conventional current that flows from the...

yeah in chem oxidation, which is the loss of electrons, (meaning that the flow of electrons come from the anode) occurs at the anode. so from this 'definition' flow of electrons comes form anode

hm okay. well. jacaranda says he named them cathode rays becuase they came FROM the cathode. not travelling towards it.. unlike in chem where cations are attracted to the cathode. its so wierd. but because the cathode is a negative electrode, its easy to understnad this. but still why is a...

okay. but why? is it something along the lines of what i said earlier, in the first post mind you a cathode is a negative electrode. according to jacaranda. so it is possible to say that the cathode is positivly charged............... cuz i simply cant accept things like. this is this just...

okay the cathode is the negative electrode. i accept that. because cations migrate towards it in an electrolytic reaction cations are positive charges which are attracted to the cathode thats negatively charged. and the anode is the positive electrode because anions migrate towards it...

hm yeah i guess so. but now im confused about another thing. with reference to galvanising. um.. is what i have to say below true? zinc is more readilly oxidised than iron. since zinc is being used to protect the iron from corrosion (which is what happens when the iron oxidses), when it...

just wondering if a metal corrodes, is it being oxidised or reduced

a rocket of inital mass 2000 tonnes, produces a constant thrust of 8 x 10^7N during lift off by expelling 1500kg of exhaust gases per second. calculate the net force acting on an 85kg astronaut 30s after liftoff i dont get how to go about calculating it

i have physics on tuesday which is my last exam so i have another three days to study JUST that! which is pretty okay cuz physics is fun and easy to study so right now im just relaxing ..and i guess regretting about how i didnt study that bloody arhenius guy and all those other scientists...

haha god that sucks! i just had my chem half yearly today too and now im worried that maybe i didnt check teh back either, my school tends to be really cheap so it is possible for them to do that. god now im worried................... : D but neh yay its over!

okay, well if the reaction is 2SO2 + O2 --> 2SO3 then i guess none of those factors will affect it cuz the reaction isnt in equilibrium. but lets assume that it is since you say the reaction has an enthalpy change of -99KJ/Mol it IS exothermic in the forward reaction so: 2SO2 + O2 <-->...