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Wikipedia:WikiProject Elements/PTG/theme-metal-nonmetal

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PTG (talk)
Periodic Table Graphics
Themes
(the sciences)
WT:ELEM
Graphics
(the presentations)
Blocks
(BLOCK) (talk)
Micro-PT
(MICRO) (talk)

Metal–Metalloid–Nonmetal

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2020

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2018

2020 note: so when halogens are not marked, a metalloids change of category?