COPPER: Centrally placed the Cu symbol, used in daily life for the fabrication of music instruments and in the construction industry.
COBALT: Centrally placed the Co symbol, used in daily life for the fabrication of curtains, leather seats, in ceramics (Delft's Blue) and in the diamond industry.
ARSENIC: Centrally placed the As symbol, used in daily life for the fabrication of glass, wood weathering protection, fighting caterpillars.
PLATINUM: Centrally placed the Pt symbol, used in daily life for the fabrication of autocatalysts, minting coins, money.
