aimed at mixed ability year 9 class
Starter Activity
Differentiated Bronze/silver/gold questions from previous lesson
Main –
Think, pair, share – how big is an atom. Copy down the size of an atom and nucleus intho their books
Copy key words need to be able to define ion and isoptope for level 4
Explain that atoms can lose or gain electrons. And what happens if they do. Students make notes on this, then go through a few examples.
Students practice working out electron/proton/neutron for ions
Extension task for students who finish
Explain what an isotope is, do one worked example of finding proton/neutron numbers then their go at finding how many protons and neutrons are in carbon isotopes
Exam practice if time
Plenary
Identify whether the pictures are atoms, ions or isotopes
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