1.5 grams <a href="https://en.wikipedia.org/wiki/barium" class="extiw" title="en:barium">barium</a> with a grey <a href="https://en.wikipedia.org/wiki/oxide" class="extiw" title="en:oxide">oxide</a> layer under <a href="https://en.wikipedia.org/wiki/argon" class="extiw" title="en:argon">argon</a>. Original size in cm: 0.7 x 1
<a href="https://en.wikipedia.org/wiki/User:Jurii" class="extiw" title="en:User:Jurii">Jurii</a>
CC BY 1.0
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