Chemistry Paper 1
Atoms and isotopes
Atomic Structure and the Periodic Table training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Atoms and isotopes is like changing a recipe: the particles, amounts and conditions decide what product you can make.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
Atoms contain protons, neutrons and electrons.
The atomic number is the number of protons.
Isotopes have the same number of protons but different numbers of neutrons.