I've come across a question that is "Account for the existence
of isotopes." and is only worth 2 marks. I'm unsure, but it is as
simple as explaining that isotopes are atoms of the same element
but with a different number of neutrons and so a different mass
number, or do I need to go into the J.J Thomson experiement or
something else? It's only 2 marks, so surely the latter isn't
necessary.
The wording is my achilles heel yet again, as I'm thinking my
answer would merely answer the question if it said define the term
isotope. Oh dear, I don't know. Any input would be helpful
here.
Also, there is this question for 14 marks:
"Isotopes can be seperated in a mass spectrometer. Show how this
is possible by describing the various parts of a mass spectrometer
and by discussing the principles of operation in each part."
I know my stuff, but would like to know how you would go about
answering the question. Layout, etc.
Thanks very much.