atomic number 38

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Noun1.atomic number 38 - a soft silver-white or yellowish metallic element of the alkali metal groupatomic number 38 - a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
Sr, strontium
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
strontium 90 - a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones
celestite - a mineral consisting of strontium sulphate
strontianite - a mineral consisting of strontium carbonate
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