{^file Coinage metals: authors differ on no matter whether roentgenium (Rg) is taken into account a coinage metal. It's in group 11, like the opposite coinage metals, and is predicted to become chemically much like gold.
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Arithmetic. an algebraic process that may API서비스 be shut less than an associative operation, as multiplication or addition, and in which There's an identity component that, on working on An additional component, leaves the second component unchanged, and by which Each and every factor has corresponding to it a singular factor that, on working on the primary, leads to the identification component.