sr
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1 Sr
A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite.
synoniemen: atomic number 38, strontium.
Nederlands: strontium
Pools: stront, Sr
2 sr
The unit of solid angle adopted under the Systeme International d'Unites.
synoniem: steradian.
Nederlands: steradiaal
Pools: steradian, sr
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