Matter is made up of very small parts called atoms. Atoms can combine in different numbers and in different ways to make different molecules. Atoms and molecules make up all of the different ...

What is an atom? Well, everything is made of atoms! Atoms themselves are made of smaller particles. In this National 4 Chemistry study guide, learn about how elements can join together in ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

The Atoms for Peace and Development motto summarises the IAEA's mission, which is to ensure that nuclear technology is used only for peaceful purposes and to help Member States use this remarkable ...