Many metals react with oxygen to form metal oxides. Potassium and sodium are soft metal which are easily cut exposing a shiny surface which changes to dull rapidly. The change from shiny to dull is ...
Revise GCSE Chemistry by listening to these GCSE podcasts from Bitesize and BBC Sounds. Listen on the BBC Sounds app when you're out and about, or listen at home as part of your GCSE exam revision.
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