Category:ja:Group 1 elements
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Japanese terms for chemical elements in group 1 of the periodic table.
NOTE: This is a set category. It should contain terms for Group 1 elements, not merely terms related to Group 1 elements. It may contain more general terms (e.g. types of Group 1 elements) or more specific terms (e.g. names of specific Group 1 elements), although there may be related categories specifically for these types of terms.