THIS is a very large and important work, and one which cannot fail to be useful to the scientific chemist. It is divided into several parts, and contains, or rather consists of, tables of the elements ...

Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance. Phew! On ...

Before we can answer that question, we need to know first: What is a solid? What’s a liquid? What’s a gas? These three materials behave in terms of the tiny particles of which they’re made. Solids, ...