Chemistry / Unit 1 Chem 0049 short lesson, about 20 seconds
Atom
Captions available
The idea
An atom is the smallest particle of an element that still carries that element's properties and can take part in a chemical combination.
In practice
Repeatedly halving a piece of gold eventually reaches a single gold atom, the smallest unit still recognizably gold.
Where people slip
An atom is not infinitely divisible — dividing it further no longer yields smaller pieces of that same element.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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