Category:pl:Period 7 elements
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Polish terms for types or instances of chemical elements in period 7 of the periodic table.
NOTE: This is a set category. It should contain terms for period 7 elements, not merely terms related to period 7 elements. It may contain more general terms (e.g. types of period 7 elements) or more specific terms (e.g. names of specific period 7 elements), although there may be related categories specifically for these types of terms.