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Inside Atoms

In this worksheet, students will explore atoms. Everything is made of atoms, but what are atoms made of?

'Inside Atoms' worksheet

Key stage:  KS 3

Curriculum topic:   Chemistry: Atoms, Elements and Compounds

Curriculum subtopic:   Atoms, Elements and Compounds

Difficulty level:  

Worksheet Overview

Everything in the world is made of atoms.  That means it's important for scientists to try to understand exactly what atoms themselves are made of.


Diagram of an atom


Atoms are made from three smaller sub-atomic particles:


Electrons - are very light particles that orbit around the nucleus at the center of the atom, in layers called energy levels or shells. The electrons are the black particles in the diagram above. 

Protons - are found inside the nucleus of the atom. The protons are the red particles shown in the diagram. The nucleus is the centre of the atom.

Neutrons - are also found inside the nucleus of the atom. The neutrons are shown by the blue colour in the diagram above.



The atomic number of each element tells us the number of protons that each atom of the element contains. For example, the element sodium has the atomic number of 11 and therefore has 11 protons in its nucleus. 

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