Scanning Probe Microscope
Davy's Electrolysis Trough
Part of the Periodic Table
Using the Periodic Table
Electron Shells (unlabelled)
What makes the element potassium violently reactive?
While the element gold can remain unchanged for thousands of years.
The key to an element's reactivity lies with the number and arrangement of its electrons.
In all atoms, negative electrons move in a relatively huge space around the positive nucleus.
But crucially, the electrons organise ...
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