a steel-gray, ductile metallic element of the rare-earth group found only in combination. Symbol: Ce; atomic weight: 140.12; atomic number: 58.
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Of the three bacteria species studied, one—Sphingomonas desiccabilis—was capable of extracting elements like neodymium, cerium, and lanthanum about as effectively in lower-gravity environments as they do on Earth.
Not to mention rare elements such as lanthanum, cerium, and neodymium, essential to modern technology and commanding high prices.
In the ordinary course cerium is thrown down along with alumina and the other earths by ammonia.
Cerium is detected by giving with borax a bead which is yellow in the oxidising, and colourless in the reducing flame.
Traces of cerium compounds boiled with dioxide of lead and nitric acid will give a yellow solution.
Cerous sulphide, Ce2S3, results on heating cerium with sulphur or cerium oxide in carbon bisulphide vapour.
These mantles contain the oxides of cerium and thorium in the ratio of about 1% of the former to 99% of the latter.