Density= mass/volume so 5.1 divided by 4.7 is 5.1 / 4.7 =1.08510638298round to the correct number of sig figs
Name:NeonSymbol:NeNumber:10Catagory:Noble GasesGroup:18Period:2Block:pStandard Atomic Weight:20.1797 g/molElectron Configuration:[He] 2s2Β 2p6Electrons Per Shell:2, 8Year Discovered:1898Discovered By:Sir William Ramsay
Morris W. Travers