Chris Bacon wrote:

Ooops! Didn't realise you are so young... (were you a "mature
student" (or pupil)?)

No.


I'm not sure that is appropriate for "O" levels, or "GCSEs"

What, a basic understanding of what molecules are, and the forces which
hold them together? Certainly was part of my GCSE physics and Chemistry.


--
Grunff