hey i think it was filtration as it was a solid precipitate
Aaah, my bad, no worries, I think I only dropped 3 or 4 marks maximum, so hopefully I will get 100/100UMS. By the way I put for the last question - As The Layers built up, the touch screen will become more unresponsive - Is that right to anyone?
Yesterday today one of my science teachers said that in the exam, only the stuff that is wrote on the dotted line is read. Is this true? Otherwise ive ****ed it.
I doubt thats true.. The only thing thats not counted is the writing outside the border..
Yesterday today one of my science teachers said that in the exam, only the stuff that is wrote on the dotted line is read. Is this true? Otherwise ive ****ed it.
if that is true then so have i. but i have a fealing that they have to mark everything that you write
b) He found the properties of aluminium and compared them to the properties of the previously discovered metals. He realised properties were different so must have been a new metal. (2)
For 1b do you think they would allow anything more specific? I put that he could pass an electrical current through to see if it was a metal, then could react it with non metals with known electronic structures and observe the compounds formed in order to check its electronic structure.
For 1b do you think they would allow anything more specific? I put that he could pass an electrical current through to see if it was a metal, then could react it with non metals with known electronic structures and observe the compounds formed in order to check its electronic structure.
I suppose that would tell you which group it is in but there has to be some mention of different properties to all other known metals to get both marks
Multiple layers of atoms won't stop a screen being transparent, but the additional layers will rub off easily, making them unnecessary as they don't make it any better.
I suppose that would tell you which group it is in but there has to be some mention of different properties to all other known metals to get both marks
Multiple layers of atoms won't stop a screen being transparent, but the additional layers will rub off easily, making them unnecessary as they don't make it any better.
i put that i said that there are weak intermolcular forces between the layers so they will rub off like graphite on a pencil do you think that is right?
i put that i said that there are weak intermolcular forces between the layers so they will rub off like graphite on a pencil do you think that is right?
i put that i said that there are weak intermolcular forces between the layers so they will rub off like graphite on a pencil do you think that is right?
Both answers are correct I would think, I'll add it to the mark scheme However I am not convinced about the surface area answer for the nanoparticles question. It's all about making the surface smooth so filling in the cracks!
Both answers are correct I would think, I'll add it to the mark scheme However I am not convinced about the surface area answer for the nanoparticles question. It's all about making the surface smooth so filling in the cracks!
i think the question was why would nanoparticles conduct heat better, i put surface area but i understand where you are coming from
Was that a reply to my statement. If so.... nanoparticles are smaller so they can fill in the gaps between the particles making the surface smoother (this point is almost certainly correct i think as there has been no serious protest apart from from you!)
The only part of the surface important is the part which is touching the processor so therefore having a large surface area would necessarily help. Like putting two pieces of paper on top of each other or loads of small squares of paper on top of a normal piece of paper. It makes no difference! However if you can argue your point clearly then I will certainly put it on the mark scheme for you
Was that a reply to my statement. If so.... nanoparticles are smaller so they can fill in the gaps between the particles making the surface smoother (this point is almost certainly correct i think as there has been no serious protest apart from from you!)
The only part of the surface important is the part which is touching the processor so therefore having a large surface area would necessarily help. Like putting two pieces of paper on top of each other or loads of small squares of paper on top of a normal piece of paper. It makes no difference! However if you can argue your point clearly then I will certainly put it on the mark scheme for you
Was that first part a question? I'm kidding, but the advantage of the larger surface area is faster transfer of heat, so that would be a relevant answer.