20122 Potassium

1 gram of potassium metal 99.8% pure in glass vial under mineral oil. The mineral oil prevents but doesn’t entirely stop the oxidization of the potassium metal, hence the purple hue.

300128 Iodine

Iodine in sealed glass ampule. Paul van den Bergen photo. And thanks to Paul for creating this… 😁

20071 Radium

Two watch hands coated with radium in phosphorescent paint. Luminous and highly fluorescent.

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