<Table> <Tr> <Th colspan="13"> ( hide ) List of chemical elements </Th> </Tr> <Tr> <Th> Z </Th> <Th> Symbol </Th> <Th> Element </Th> <Th> Origin of name </Th> <Th> Group </Th> <Th> Period </Th> <Th> Atomic weight ( u ( ± ) ) </Th> <Th> Density ( g / cm ) </Th> <Th> Melt ( K ) </Th> <Th> Boil ( K ) </Th> <Th> C ( J / g K ) </Th> <Th> χ </Th> <Th> Abundance in Earth 's crust ( mg / kg ) </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Hydrogen </Td> <Td> composed of the Greek elements hydro - and - gen meaning ' water - forming ' </Td> <Td> </Td> <Td> </Td> <Td> 001 ! 1.008 </Td> <Td> 0.00008988 </Td> <Td> 0014 ! 14.01 </Td> <Td> 20.28 </Td> <Td> 14.304 </Td> <Td> 2.20 </Td> <Td> 1400 </Td> </Tr> <Tr> <Td> </Td> <Td> He </Td> <Td> Helium </Td> <Td> the Greek helios , ' sun ' </Td> <Td> 18 </Td> <Td> </Td> <Td> 004 ! 4.002602 ( 2 ) </Td> <Td> 0.0001785 </Td> <Td> 0.1 ! -- </Td> <Td> 4.22 </Td> <Td> 5.193 </Td> <Td> -- </Td> <Td> 0.008 </Td> </Tr> <Tr> <Td> </Td> <Td> Li </Td> <Td> Lithium </Td> <Td> the Greek lithos , ' stone ' </Td> <Td> </Td> <Td> </Td> <Td> 007 ! 6.94 </Td> <Td> 0.534 </Td> <Td> 0454 ! 453.69 </Td> <Td> 1560 </Td> <Td> 3.582 </Td> <Td> 0.98 </Td> <Td> 20 </Td> </Tr> <Tr> <Td> </Td> <Td> Be </Td> <Td> Beryllium </Td> <Td> beryl , a mineral </Td> <Td> </Td> <Td> </Td> <Td> 009 ! 9.0121831 ( 5 ) </Td> <Td> 1.85 </Td> <Td> 1560 ! 1560 </Td> <Td> 2742 </Td> <Td> 1.825 </Td> <Td> 1.57 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Boron </Td> <Td> borax , a mineral </Td> <Td> 13 </Td> <Td> </Td> <Td> 011 ! 10.81 </Td> <Td> 2.34 </Td> <Td> 2349 ! 2349 </Td> <Td> 4200 </Td> <Td> 1.026 </Td> <Td> 2.04 </Td> <Td> 10 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> </Td> <Td> Carbon </Td> <Td> the Latin carbo , ' coal ' </Td> <Td> 14 </Td> <Td> </Td> <Td> 012 ! 12.011 </Td> <Td> 2.267 </Td> <Td> 3800 ! 3800 </Td> <Td> 4300 </Td> <Td> 0.709 </Td> <Td> 2.55 </Td> <Td> 200 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> </Td> <Td> Nitrogen </Td> <Td> the Greek nitron and ' - gen ' meaning ' niter - forming ' </Td> <Td> 15 </Td> <Td> </Td> <Td> 014 ! 14.007 </Td> <Td> 0.0012506 </Td> <Td> 0063 ! 63.15 </Td> <Td> 77.36 </Td> <Td> 1.04 </Td> <Td> 3.04 </Td> <Td> 19 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> O </Td> <Td> Oxygen </Td> <Td> from the Greek oxy - , both ' sharp ' and ' acid ' , and - gen , meaning ' acid - forming ' </Td> <Td> 16 </Td> <Td> </Td> <Td> 016 ! 15.999 </Td> <Td> 0.001429 </Td> <Td> 0054 ! 54.36 </Td> <Td> 90.20 </Td> <Td> 0.918 </Td> <Td> 3.44 </Td> <Td> 461000 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> </Td> <Td> Fluorine </Td> <Td> the Latin fluere , ' to flow ' </Td> <Td> 17 </Td> <Td> </Td> <Td> 019 ! 18.998403163 ( 6 ) </Td> <Td> 0.001696 </Td> <Td> 0053.5 ! 53.53 </Td> <Td> 85.03 </Td> <Td> 0.824 </Td> <Td> 3.98 </Td> <Td> 585 </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Ne </Td> <Td> Neon </Td> <Td> the Greek neos , meaning ' new ' </Td> <Td> 18 </Td> <Td> </Td> <Td> 020 ! 20.1797 ( 6 ) </Td> <Td> 0.0008999 </Td> <Td> 0024.56 ! 24.56 </Td> <Td> 27.07 </Td> <Td> 1.03 </Td> <Td> -- </Td> <Td> 0.005 </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Na </Td> <Td> Sodium </Td> <Td> the English word soda ( natrium in Latin ) </Td> <Td> </Td> <Td> </Td> <Td> 023 ! 22.98976928 ( 2 ) </Td> <Td> 0.971 </Td> <Td> 0371 ! 370.87 </Td> <Td> 1156 </Td> <Td> 1.228 </Td> <Td> 0.93 </Td> <Td> 23600 </Td> </Tr> <Tr> <Td> 12 </Td> <Td> Mg </Td> <Td> Magnesium </Td> <Td> Magnesia , a district of Eastern Thessaly in Greece </Td> <Td> </Td> <Td> </Td> <Td> 024 ! 24.305 </Td> <Td> 1.738 </Td> <Td> 0923 ! 923 </Td> <Td> 1363 </Td> <Td> 1.023 </Td> <Td> 1.31 </Td> <Td> 23300 </Td> </Tr> <Tr> <Td> 13 </Td> <Td> Al </Td> <Td> Aluminium </Td> <Td> from alumina , a compound ( originally aluminum ) </Td> <Td> 13 </Td> <Td> </Td> <Td> 027 ! 26.9815385 ( 7 ) </Td> <Td> 2.698 </Td> <Td> 0933.5 ! 933.47 </Td> <Td> 2792 </Td> <Td> 0.897 </Td> <Td> 1.61 </Td> <Td> 82300 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> Si </Td> <Td> Silicon </Td> <Td> from the Latin silex , ' flint ' ( originally
<Table> <Tr> <Th colspan="13"> ( hide ) List of chemical elements </Th> </Tr> <Tr> <Th> Z </Th> <Th> Symbol </Th> <Th> Element </Th> <Th> Origin of name </Th> <Th> Group </Th> <Th> Period </Th> <Th> Atomic weight ( u ( ± ) ) </Th> <Th> Density ( g / cm ) </Th> <Th> Melt ( K ) </Th> <Th> Boil ( K ) </Th> <Th> C ( J / g K ) </Th> <Th> χ </Th> <Th> Abundance in Earth 's crust ( mg / kg ) </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Hydrogen </Td> <Td> composed of the Greek elements hydro - and - gen meaning ' water - forming ' </Td> <Td> </Td> <Td> </Td> <Td> 001 ! 1.008 </Td> <Td> 0.00008988 </Td> <Td> 0014 ! 14.01 </Td> <Td> 20.28 </Td> <Td> 14.304 </Td> <Td> 2.20 </Td> <Td> 1400 </Td> </Tr> <Tr> <Td> </Td> <Td> He </Td> <Td> Helium </Td> <Td> the Greek helios , ' sun ' </Td> <Td> 18 </Td> <Td> </Td> <Td> 004 ! 4.002602 ( 2 ) </Td> <Td> 0.0001785 </Td> <Td> 0.1 ! -- </Td> <Td> 4.22 </Td> <Td> 5.193 </Td> <Td> -- </Td> <Td> 0.008 </Td> </Tr> <Tr> <Td> </Td> <Td> Li </Td> <Td> Lithium </Td> <Td> the Greek lithos , ' stone ' </Td> <Td> </Td> <Td> </Td> <Td> 007 ! 6.94 </Td> <Td> 0.534 </Td> <Td> 0454 ! 453.69 </Td> <Td> 1560 </Td> <Td> 3.582 </Td> <Td> 0.98 </Td> <Td> 20 </Td> </Tr> <Tr> <Td> </Td> <Td> Be </Td> <Td> Beryllium </Td> <Td> beryl , a mineral </Td> <Td> </Td> <Td> </Td> <Td> 009 ! 9.0121831 ( 5 ) </Td> <Td> 1.85 </Td> <Td> 1560 ! 1560 </Td> <Td> 2742 </Td> <Td> 1.825 </Td> <Td> 1.57 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Boron </Td> <Td> borax , a mineral </Td> <Td> 13 </Td> <Td> </Td> <Td> 011 ! 10.81 </Td> <Td> 2.34 </Td> <Td> 2349 ! 2349 </Td> <Td> 4200 </Td> <Td> 1.026 </Td> <Td> 2.04 </Td> <Td> 10 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> </Td> <Td> Carbon </Td> <Td> the Latin carbo , ' coal ' </Td> <Td> 14 </Td> <Td> </Td> <Td> 012 ! 12.011 </Td> <Td> 2.267 </Td> <Td> 3800 ! 3800 </Td> <Td> 4300 </Td> <Td> 0.709 </Td> <Td> 2.55 </Td> <Td> 200 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> </Td> <Td> Nitrogen </Td> <Td> the Greek nitron and ' - gen ' meaning ' niter - forming ' </Td> <Td> 15 </Td> <Td> </Td> <Td> 014 ! 14.007 </Td> <Td> 0.0012506 </Td> <Td> 0063 ! 63.15 </Td> <Td> 77.36 </Td> <Td> 1.04 </Td> <Td> 3.04 </Td> <Td> 19 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> O </Td> <Td> Oxygen </Td> <Td> from the Greek oxy - , both ' sharp ' and ' acid ' , and - gen , meaning ' acid - forming ' </Td> <Td> 16 </Td> <Td> </Td> <Td> 016 ! 15.999 </Td> <Td> 0.001429 </Td> <Td> 0054 ! 54.36 </Td> <Td> 90.20 </Td> <Td> 0.918 </Td> <Td> 3.44 </Td> <Td> 461000 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> </Td> <Td> Fluorine </Td> <Td> the Latin fluere , ' to flow ' </Td> <Td> 17 </Td> <Td> </Td> <Td> 019 ! 18.998403163 ( 6 ) </Td> <Td> 0.001696 </Td> <Td> 0053.5 ! 53.53 </Td> <Td> 85.03 </Td> <Td> 0.824 </Td> <Td> 3.98 </Td> <Td> 585 </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Ne </Td> <Td> Neon </Td> <Td> the Greek neos , meaning ' new ' </Td> <Td> 18 </Td> <Td> </Td> <Td> 020 ! 20.1797 ( 6 ) </Td> <Td> 0.0008999 </Td> <Td> 0024.56 ! 24.56 </Td> <Td> 27.07 </Td> <Td> 1.03 </Td> <Td> -- </Td> <Td> 0.005 </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Na </Td> <Td> Sodium </Td> <Td> the English word soda ( natrium in Latin ) </Td> <Td> </Td> <Td> </Td> <Td> 023 ! 22.98976928 ( 2 ) </Td> <Td> 0.971 </Td> <Td> 0371 ! 370.87 </Td> <Td> 1156 </Td> <Td> 1.228 </Td> <Td> 0.93 </Td> <Td> 23600 </Td> </Tr> <Tr> <Td> 12 </Td> <Td> Mg </Td> <Td> Magnesium </Td> <Td> Magnesia , a district of Eastern Thessaly in Greece </Td> <Td> </Td> <Td> </Td> <Td> 024 ! 24.305 </Td> <Td> 1.738 </Td> <Td> 0923 ! 923 </Td> <Td> 1363 </Td> <Td> 1.023 </Td> <Td> 1.31 </Td> <Td> 23300 </Td> </Tr> <Tr> <Td> 13 </Td> <Td> Al </Td> <Td> Aluminium </Td> <Td> from alumina , a compound ( originally aluminum ) </Td> <Td> 13 </Td> <Td> </Td> <Td> 027 ! 26.9815385 ( 7 ) </Td> <Td> 2.698 </Td> <Td> 0933.5 ! 933.47 </Td> <Td> 2792 </Td> <Td> 0.897 </Td> <Td> 1.61 </Td> <Td> 82300 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> Si </Td> <Td> Silicon </Td> <Td> from the Latin silex , ' flint ' ( originally
what does the symbol h stand for in chemistry
what does the symbol h stand for in chemistry
Hydrogen
Hydrogen