Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
the movement of particles suspended in a fluid (a liquid or a gas) as a result of being bumped by other, smaller particles.
a molecule that is so big that we can see it, e.g. diamond.
reactions in which an atom or group of atoms is replaced in a molecule by another atom or group...
centre part of an atom with positive charge concentrated in a tiny kernel.