Elements - Metals and Non-Metals

Elements and Pure Substances

Over the last couple of weeks, we have learned how to separate mixtures. We have been separating them into their pure substances.

Today, we learned what some of those pure substances are:

• elements
• compounds

Some elements exist as atoms, while some exist as molecules. The elements are all found on the Periodic Table, which has their special symbol.

Compounds are formed when different elements react. This means they join together chemically, forming bonds between the atoms. Compounds can be molecules (like some elements) or they can be ionic. We learn more about these in the next few years of Science and Chemistry...

Our task today was to classify all matter from what we have learned in the last few weeks and in today's lesson.

Chromatography

Chromatography is a method used to separate differently-coloured pigments.

We did an experiment to help us understand what chromatograhy really is and how it works. Thank you to Angus and Flynn for the results:

The Set Up (BEFORE)

The Results - the colours have separated (AFTER)

Separating Solutions - Evaporation and Distillation

First, we had to DESCRIBE Evaporation and Distillation:

For homework, we need to EVALUATE wen each method should be used: