Middle school2/2 lessonsBridge chapter

Toward high school

Bridge chapter: a first encounter with two central high-school notions — amount of substance and the periodic classification.

01
Introduction to amount of substance
Why chemists count in packs: intuition of the mole without full formalism. Link to molar mass.
8 min
02
First look at the periodic classification
Reading the table, spotting families (alkali metals, halogens, noble gases). Why some elements share properties.
9 min