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symbol for the element roentgeniumroentgenium,
artificially produced radioactive chemical element; symbol Rg; at. no. 111; mass number of most stable isotope 280; m.p., b.p., sp. gr., and valence unknown. Situated in Group 11 of the periodic table, it is expected to have properties similar to those of gold.
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(1) (Residential Gateway) See cable/DSL gateway.

(2) (Radio Grade) See coaxial cable.