Wikipedia:WikiProject Elements/PTG/categories/DP-2020-chess

Periodic table legend

Summary

 * "DP-2020-rainb" has rainbow order.
 * This "DP-2020-chess" uses same colors, but ordered to be 'checkered': alternate neighbouring colors (hues) to enlarge difference (distinction).


 * See Periodic table legend

Contrasts





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 * For practical purposes, "DP-2020-chess" sets HAL = ONONM (was one category in 2018)