Category:pt:Period 3 elements
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Portuguese terms for chemical elements in period 3 of the periodic table.
NOTE: This is a set category. It should contain terms for Period 3 elements, not merely terms related to Period 3 elements. It may contain more general terms (e.g. types of Period 3 elements) or more specific terms (e.g. names of specific Period 3 elements), although there may be related categories specifically for these types of terms.