John Dalton of Manchester first showed that everything was made of atoms October 1803

You are all made of very tiny atoms ©

An Atom

Atoms

. Atoms are so tiny that even large ones can only just be “seen” with the most powerful microscopes ©

Your main atoms are ©

Your main atoms are Carbon atoms C ©

Your main atoms are Carbon atoms Nitrogen atoms C N ©

Your main atoms are Carbon atoms Nitrogen atoms Oxygen atoms C N O ©

Carbon atoms Oxygen atoms Hydrogen atoms C N O H Your main atoms are Nitrogen atoms Oxygen atoms Hydrogen atoms C N O H ©

Atom stick together to make molecules ©

Two hydrogen (H) atoms attached to an Oxygen (O) atom A water molecule Two hydrogen (H) atoms attached to an Oxygen (O) atom

In water vapour the molecules are very far apart but in liquid water the molecules, which are somewhat “sticky”, are close together

In air there are ©

In air there are oxygen molecules O O ©

In air there are oxygen molecules and nitrogen molecules O O N N ©

A water molecule has one oxygen atom stuck to two hydrogen atoms ©

That’s why it is called H2O ©

Water molecules are also very very tiny H H ©

There are a LOT of tiny water molecules in a glass of water ©

You are all made out of lots and lots of very tiny molecules ©

Penicillin is one of the most important molecules we have ever discovered

One of the prettiest molecules is the Buckyball ©

It has 60 carbon atoms and is the same shape as a football ©

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Paper read to the Manchester Literary and Philosophical Society, 20th October 1803

Paper read to the Manchester Literary and Philosophical Society, 20th October 1803

O=C=O Carbon Dioxide CO2 Carbon Oxygen Paper read to the Manchester Literary and Philosophical Society, 20th October 1803

1/3 nm CO2

Carbon Oxygen O=C=O Carbon Dioxide CO2

There are a LOT of tiny water molecules in a glass of water ©

You are all made of very tiny atoms ©