Original media from our community.
Three bottles filled with oil and multiple chunks of Lanthanum metal. Lanthanum is extremely difficult to keep shiny, even in oil. These samples have a heavy layer of black tarnish.
The first four elements of the F-block: |la|, |ce|, |pr|, and |nd|
Small shiny piece of Lanthanum metal, in an ampoule which itself is in a small bottle.
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