Learning Outcomes:

1. describe an atom as an entity that is electrically neutral and is made up of a positively charged nucleus (protons and neutrons) with negatively charged electrons moving around the nucleus

2. [Optional for NA] recognise that atoms have mass that is mainly contributed by the mass of the nucleus

3. show an awareness that the atoms of an element have a unique number of protons

4. show an understanding that a molecule is a group of two or more atoms that are chemically combined

5. state the numbers and types of atoms, given the chemical symbol of an element or the chemical formula of a compound, e.g., carbon dioxide

6. compare the relative sizes of an atom to everyday objects

7. compare atoms and molecules

8. [Optional for NA] describe the structure of atoms in terms of electronic configuration and structure

9. [Optional for NA] show an appreciation of how, in practice, models are constructed, justified and continuously revised as they are used to probe new phenomena and collect additional data

10. show an awareness that technologies resulting from the knowledge of atoms have created social and ethical issues, risks and costs (e.g., atomic bombs)