noun
a group of chemical elements that are part of the actinide series on the periodic table
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The actinoids are a series of chemical elements in the periodic table with atomic numbers ranging from 89 to 103.
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Do you know about the actinoids, those elements with really high atomic numbers?
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The actinoids are like the rockstars of the periodic table, with their high atomic numbers and unique properties.
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Just like how the actinoids stand out in the periodic table, sometimes we need to stand out in a crowd to make an impact.