The three states of matter can be represented by the particle model. This model explains the properties of substances in their different states, as well as changes of state. Changes of state: ...

Tailor-made membranes offer a cleaner method for the industrial-scale separation of chemical mixtures, says Suzana Nunes. But first we need to make their manufacture greener. Porous polymeric ...

There are different ways to separate mixtures, for example by filtration, crystallisation, distillation, or chromatography. The method chosen depends upon the type of mixture. Periodic table - OCR ...

Humans and wildlife are exposed to hundreds of chemicals at varying doses every day, for example in the air we breathe, the water we drink, the food we eat and from the consumer products we use.