Colour depends on the relevant atom having energy levels spaced so that either
that coloured ... As others have answered,
Product Description. Shipped in a resealable bag that is sealed for safety and freshness. ... This item:Black Copper Oxide - Cupric Oxide - CuO - 1 Pound $9.50 .
Virtually insoluble in water or alcohols;
Shipped double-bagged in resealable bags.
Kyoto University researchers have discovered a way of replacing surface ions of
Sigma-Aldrich offers Aldrich-544868,
Oxygen can combine with
Sigma-Aldrich offers Aldrich-450812,