{"thcode":2,"term":{"code":1427,"name":"chemical elements","parent":1382,"scope":"Chemical substances distinguished by atomic number. http:\/\/periodic.lanl.gov\/"},"uf":[],"bt":[{"code":1382,"name":"elements","parent":1174,"scope":"Chemical elements and element groups"},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1385,"name":"actinium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Ac and atomic number 89 <http:\/\/periodic.lanl.gov\/89.shtml>"},{"code":1390,"name":"aluminum","parent":1427,"scope":"Metalloid element with symbol Al and atomic number 13 <http:\/\/periodic.lanl.gov\/13.shtml>"},{"code":1392,"name":"americium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Am and atomic number 95 <http:\/\/periodic.lanl.gov\/95.shtml>"},{"code":1393,"name":"antimony","parent":1427,"scope":"Metalloid element with symbol Sb and atomic number 51 <http:\/\/periodic.lanl.gov\/51.shtml>"},{"code":1395,"name":"argon","parent":1427,"scope":"Noble gas element with symbol Ar and atomic number 18 <http:\/\/periodic.lanl.gov\/18.shtml>"},{"code":1396,"name":"arsenic","parent":1427,"scope":"Nonmetal element with symbol As and atomic number 33 <http:\/\/periodic.lanl.gov\/33.shtml>"},{"code":1398,"name":"astatine","parent":1427,"scope":"Halogen element with symbol At and atomic number 85 <http:\/\/periodic.lanl.gov\/85.shtml>"},{"code":1403,"name":"barium","parent":1427,"scope":"Alkaline earth element with symbol Ba and atomic number 56 <http:\/\/periodic.lanl.gov\/56.shtml>"},{"code":1405,"name":"berkelium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Bk and atomic number 97 <http:\/\/periodic.lanl.gov\/97.shtml>"},{"code":1406,"name":"beryllium","parent":1427,"scope":"Alkaline earth element with symbol Be and atomic number 4 <http:\/\/periodic.lanl.gov\/4.shtml>"},{"code":1409,"name":"bismuth","parent":1427,"scope":"Metalloid element with symbol Bi and atomic number 83 <http:\/\/periodic.lanl.gov\/83.shtml>"},{"code":1411,"name":"bohrium","parent":1427,"scope":"Metal element with symbol Bh and atomic number 107 <http:\/\/periodic.lanl.gov\/107.shtml>"},{"code":1412,"name":"boron","parent":1427,"scope":"Nonmetal element with symbol B and atomic number 5 <http:\/\/periodic.lanl.gov\/5.shtml>"},{"code":1414,"name":"bromine","parent":1427,"scope":"Halogen element with symbol Br and atomic number 35 <http:\/\/periodic.lanl.gov\/35.shtml>"},{"code":1417,"name":"cadmium","parent":1427,"scope":"Metal element with symbol Cd and atomic number 48 <http:\/\/periodic.lanl.gov\/48.shtml>"},{"code":1418,"name":"calcium","parent":1427,"scope":"Alkaline earth element with symbol Ca and atomic number 20 <http:\/\/periodic.lanl.gov\/20.shtml>"},{"code":1419,"name":"californium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Cf and atomic number 98 <http:\/\/periodic.lanl.gov\/98.shtml>"},{"code":1420,"name":"carbon","parent":1427,"scope":"Nonmetal element with symbol C and atomic number 6 <http:\/\/periodic.lanl.gov\/6.shtml>"},{"code":1423,"name":"cerium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Ce and atomic number 58 <http:\/\/periodic.lanl.gov\/58.shtml>"},{"code":1424,"name":"cesium","parent":1427,"scope":"Alkali metal element with symbol Cs and atomic number 55 <http:\/\/periodic.lanl.gov\/55.shtml>"},{"code":1428,"name":"chlorine","parent":1427,"scope":"Halogen element with symbol Cl and atomic number 17 <http:\/\/periodic.lanl.gov\/17.shtml>"},{"code":1429,"name":"chromium","parent":1427,"scope":"Metal element with symbol Cr and atomic number 24 <http:\/\/periodic.lanl.gov\/24.shtml>"},{"code":1433,"name":"cobalt","parent":1427,"scope":"Metal element with symbol Co and atomic number 27 <http:\/\/periodic.lanl.gov\/27.shtml>"},{"code":1434,"name":"copper","parent":1427,"scope":"Metal element with symbol Cu and atomic number 29 <http:\/\/periodic.lanl.gov\/29.shtml>"},{"code":1438,"name":"curium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Cm and atomic number 96 <http:\/\/periodic.lanl.gov\/96.shtml>"},{"code":1439,"name":"darmstadtium","parent":1427,"scope":"Metal element with symbol Ds and atomic number 110 <http:\/\/periodic.lanl.gov\/110.shtml>"},{"code":1442,"name":"dubnium","parent":1427,"scope":"Metal element with symbol Db and atomic number 105 <http:\/\/periodic.lanl.gov\/105.shtml>"},{"code":1444,"name":"dysprosium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Dy and atomic number 66 <http:\/\/periodic.lanl.gov\/66.shtml>"},{"code":1445,"name":"einsteinium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Es and atomic number 99 <http:\/\/periodic.lanl.gov\/99.shtml>"},{"code":1447,"name":"erbium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Er and atomic number 68 <http:\/\/periodic.lanl.gov\/68.shtml>"},{"code":1450,"name":"europium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Eu and atomic number 63 <http:\/\/periodic.lanl.gov\/63.shtml>"},{"code":1453,"name":"fermium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Fm and atomic number 100 <http:\/\/periodic.lanl.gov\/100.shtml>"},{"code":1454,"name":"fluorine","parent":1427,"scope":"Halogen element with symbol F and atomic number 9 <http:\/\/periodic.lanl.gov\/9.shtml>"},{"code":1457,"name":"francium","parent":1427,"scope":"Alkali metal element with symbol Fr and atomic number 87 <http:\/\/periodic.lanl.gov\/87.shtml>"},{"code":1459,"name":"gadolinium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Gd and atomic number 64 <http:\/\/periodic.lanl.gov\/64.shtml>"},{"code":1460,"name":"gallium","parent":1427,"scope":"Metalloid element with symbol Ga and atomic number 31 <http:\/\/periodic.lanl.gov\/31.shtml>"},{"code":1463,"name":"germanium","parent":1427,"scope":"Metalloid element with symbol Ge and atomic number 32 <http:\/\/periodic.lanl.gov\/32.shtml>"},{"code":1464,"name":"gold","parent":1427,"scope":"Metal element with symbol Au and atomic number 79 <http:\/\/periodic.lanl.gov\/79.shtml>"},{"code":1466,"name":"hafnium","parent":1427,"scope":"Metal element with symbol Hf and atomic number 72 <http:\/\/periodic.lanl.gov\/72.shtml>"},{"code":1468,"name":"hassium","parent":1427,"scope":"Metal element with symbol Hs and atomic number 108 <http:\/\/periodic.lanl.gov\/108.shtml>"},{"code":1470,"name":"helium","parent":1427,"scope":"Noble gas element with symbol He and atomic number 2 <http:\/\/periodic.lanl.gov\/2.shtml>"},{"code":1474,"name":"holmium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Ho and atomic number 67 <http:\/\/periodic.lanl.gov\/67.shtml>"},{"code":1476,"name":"hydrogen","parent":1427,"scope":"Alkali metal element with symbol H and atomic number 1 <http:\/\/periodic.lanl.gov\/1.shtml>"},{"code":1479,"name":"indium","parent":1427,"scope":"Metalloid element with symbol In and atomic number 49 <http:\/\/periodic.lanl.gov\/49.shtml>"},{"code":1481,"name":"iodine","parent":1427,"scope":"Halogen element with symbol I and atomic number 53 <http:\/\/periodic.lanl.gov\/53.shtml>"},{"code":1484,"name":"iridium","parent":1427,"scope":"Metal element with symbol Ir and atomic number 77 <http:\/\/periodic.lanl.gov\/77.shtml>"},{"code":1483,"name":"iron","parent":1427,"scope":"Metal element with symbol Fe and atomic number 26 <http:\/\/periodic.lanl.gov\/26.shtml>"},{"code":1487,"name":"krypton","parent":1427,"scope":"Noble gas element with symbol Kr and atomic number 36 <http:\/\/periodic.lanl.gov\/36.shtml>"},{"code":1490,"name":"lanthanum","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol La and atomic number 57 <http:\/\/periodic.lanl.gov\/57.shtml>"},{"code":1491,"name":"lawrencium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Lr and atomic number 103 <http:\/\/periodic.lanl.gov\/103.shtml>"},{"code":1492,"name":"lead","parent":1427,"scope":"Metalloid element with symbol Pb and atomic number 82 <http:\/\/periodic.lanl.gov\/82.shtml>"},{"code":1494,"name":"lithium","parent":1427,"scope":"Alkali metal element with symbol Li and atomic number 3 <http:\/\/periodic.lanl.gov\/3.shtml>"},{"code":1497,"name":"lutetium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Lu and atomic number 71 <http:\/\/periodic.lanl.gov\/71.shtml>"},{"code":1498,"name":"magnesium","parent":1427,"scope":"Alkaline earth element with symbol Mg and atomic number 12 <http:\/\/periodic.lanl.gov\/12.shtml>"},{"code":1499,"name":"manganese","parent":1427,"scope":"Metal element with symbol Mn and atomic number 25 <http:\/\/periodic.lanl.gov\/25.shtml>"},{"code":1501,"name":"meitnerium","parent":1427,"scope":"Metal element with symbol Mt and atomic number 109 <http:\/\/periodic.lanl.gov\/109.shtml>"},{"code":1502,"name":"mendelevium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Md and atomic number 101 <http:\/\/periodic.lanl.gov\/101.shtml>"},{"code":1503,"name":"mercury","parent":1427,"scope":"Metal element with symbol Hg and atomic number 80 <http:\/\/periodic.lanl.gov\/80.shtml>"},{"code":1509,"name":"molybdenum","parent":1427,"scope":"Metal element with symbol Mo and atomic number 42 <http:\/\/periodic.lanl.gov\/42.shtml>"},{"code":1516,"name":"neodymium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Nd and atomic number 60 <http:\/\/periodic.lanl.gov\/60.shtml>"},{"code":1517,"name":"neon","parent":1427,"scope":"Noble gas element with symbol Ne and atomic number 10 <http:\/\/periodic.lanl.gov\/10.shtml>"},{"code":1518,"name":"neptunium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Np and atomic number 93 <http:\/\/periodic.lanl.gov\/93.shtml>"},{"code":1520,"name":"nickel","parent":1427,"scope":"Metal element with symbol Ni and atomic number 28 <http:\/\/periodic.lanl.gov\/28.shtml>"},{"code":1521,"name":"niobium","parent":1427,"scope":"Metal element with symbol Nb and atomic number 41 <http:\/\/periodic.lanl.gov\/41.shtml>"},{"code":1522,"name":"nitrogen","parent":1427,"scope":"Nonmetal element with symbol N and atomic number 7 <http:\/\/periodic.lanl.gov\/7.shtml>"},{"code":1524,"name":"nobelium","parent":1427,"scope":"Rare earth (actinide series) element with symbol No and atomic number 102 <http:\/\/periodic.lanl.gov\/102.shtml>"},{"code":1530,"name":"osmium","parent":1427,"scope":"Metal element with symbol Os and atomic number 76 <http:\/\/periodic.lanl.gov\/76.shtml>"},{"code":1531,"name":"oxygen","parent":1427,"scope":"Nonmetal element with symbol O and atomic number 8 <http:\/\/periodic.lanl.gov\/8.shtml>"},{"code":1534,"name":"palladium","parent":1427,"scope":"Metal element with symbol Pd and atomic number 46 <http:\/\/periodic.lanl.gov\/46.shtml>"},{"code":1537,"name":"phosphorus","parent":1427,"scope":"Nonmetal element with symbol P and atomic number 15 <http:\/\/periodic.lanl.gov\/15.shtml>"},{"code":1538,"name":"platinum","parent":1427,"scope":"Metal element with symbol Pt and atomic number 78 <http:\/\/periodic.lanl.gov\/78.shtml>"},{"code":1539,"name":"plutonium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Pu and atomic number 94 <http:\/\/periodic.lanl.gov\/94.shtml>"},{"code":1542,"name":"polonium","parent":1427,"scope":"Metalloid element with symbol Po and atomic number 84 <http:\/\/periodic.lanl.gov\/84.shtml>"},{"code":1543,"name":"potassium","parent":1427,"scope":"Alkali metal element with symbol K and atomic number 19 <http:\/\/periodic.lanl.gov\/19.shtml>"},{"code":1545,"name":"praseodymium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Pr and atomic number 59 <http:\/\/periodic.lanl.gov\/59.shtml>"},{"code":1546,"name":"promethium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Pm and atomic number 61 <http:\/\/periodic.lanl.gov\/61.shtml>"},{"code":1547,"name":"protactinium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Pa and atomic number 91 <http:\/\/periodic.lanl.gov\/91.shtml>"},{"code":1551,"name":"radium","parent":1427,"scope":"Alkaline earth element with symbol Ra and atomic number 88 <http:\/\/periodic.lanl.gov\/88.shtml>"},{"code":1552,"name":"radon","parent":1427,"scope":"Noble gas element with symbol Rn and atomic number 86 <http:\/\/periodic.lanl.gov\/86.shtml>"},{"code":1558,"name":"rhenium","parent":1427,"scope":"Metal element with symbol Re and atomic number 75 <http:\/\/periodic.lanl.gov\/75.shtml>"},{"code":1559,"name":"rhodium","parent":1427,"scope":"Metal element with symbol Rh and atomic number 45 <http:\/\/periodic.lanl.gov\/45.shtml>"},{"code":1562,"name":"rubidium","parent":1427,"scope":"Alkali metal element with symbol Rb and atomic number 37 <http:\/\/periodic.lanl.gov\/37.shtml>"},{"code":1563,"name":"ruthenium","parent":1427,"scope":"Metal element with symbol Ru and atomic number 44 <http:\/\/periodic.lanl.gov\/44.shtml>"},{"code":1564,"name":"rutherfordium","parent":1427,"scope":"Metal element with symbol Rf and atomic number 104 <http:\/\/periodic.lanl.gov\/104.shtml>"},{"code":1566,"name":"samarium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Sm and atomic number 62 <http:\/\/periodic.lanl.gov\/62.shtml>"},{"code":1569,"name":"scandium","parent":1427,"scope":"Metal element with symbol Sc and atomic number 21 <http:\/\/periodic.lanl.gov\/21.shtml>"},{"code":1571,"name":"seaborgium","parent":1427,"scope":"Metal element with symbol Sg and atomic number 106 <http:\/\/periodic.lanl.gov\/106.shtml>"},{"code":1572,"name":"selenium","parent":1427,"scope":"Nonmetal element with symbol Se and atomic number 34 <http:\/\/periodic.lanl.gov\/34.shtml>"},{"code":1575,"name":"silicon","parent":1427,"scope":"Nonmetal element with symbol si and atomic number 14 <http:\/\/periodic.lanl.gov\/14.shtml>"},{"code":1576,"name":"silver","parent":1427,"scope":"Metal element with symbol Ag and atomic number 47 <http:\/\/periodic.lanl.gov\/47.shtml>"},{"code":1579,"name":"sodium","parent":1427,"scope":"Alkali metal element with symbol Na and atomic number 11 <http:\/\/periodic.lanl.gov\/11.shtml>"},{"code":1581,"name":"strontium","parent":1427,"scope":"Alkaline earth element with symbol Sr and atomic number 38 <http:\/\/periodic.lanl.gov\/38.shtml>"},{"code":1582,"name":"sulfur","parent":1427,"scope":"Nonmetal element with symbol S and atomic number 16 <http:\/\/periodic.lanl.gov\/16.shtml>"},{"code":1584,"name":"tantalum","parent":1427,"scope":"Metal element with symbol Ta and atomic number 73 <http:\/\/periodic.lanl.gov\/73.shtml>"},{"code":1588,"name":"technetium","parent":1427,"scope":"Metal element with symbol Tc and atomic number 43 <http:\/\/periodic.lanl.gov\/43.shtml>"},{"code":1589,"name":"tellurium","parent":1427,"scope":"Nonmetal element with symbol Te and atomic number 52 <http:\/\/periodic.lanl.gov\/52.shtml>"},{"code":1590,"name":"terbium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Tb and atomic number 65 <http:\/\/periodic.lanl.gov\/65.shtml>"},{"code":1592,"name":"thallium","parent":1427,"scope":"Metalloid element with symbol Tl and atomic number 81 <http:\/\/periodic.lanl.gov\/81.shtml>"},{"code":1593,"name":"thorium","parent":1427,"scope":"Rare earth (actinide series) element with symbol Th and atomic number 90 <http:\/\/periodic.lanl.gov\/90.shtml>"},{"code":1594,"name":"thulium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Tm and atomic number 69 <http:\/\/periodic.lanl.gov\/69.shtml>"},{"code":1596,"name":"tin","parent":1427,"scope":"Metalloid element with symbol Sn and atomic number 50 <http:\/\/periodic.lanl.gov\/50.shtml>"},{"code":1597,"name":"titanium","parent":1427,"scope":"Metal element with symbol Ti and atomic number 22 <http:\/\/periodic.lanl.gov\/22.shtml>"},{"code":1600,"name":"tungsten","parent":1427,"scope":"Metal element with symbol W and atomic number 74 <http:\/\/periodic.lanl.gov\/74.shtml>"},{"code":1602,"name":"ununnilium","parent":1427,"scope":"Metal element with symbol Uuu and atomic number 111 <http:\/\/periodic.lanl.gov\/111.shtml>"},{"code":1603,"name":"ununnubium","parent":1427,"scope":"Metal element with symbol Uub and atomic number 113 <http:\/\/periodic.lanl.gov\/113.shtml>"},{"code":1604,"name":"ununnunium","parent":1427,"scope":"Metal element with symbol Uun and atomic number 112 <http:\/\/periodic.lanl.gov\/112.shtml>"},{"code":1605,"name":"uranium","parent":1427,"scope":"Rare earth (actinide series) element with symbol U and atomic number 92 <http:\/\/periodic.lanl.gov\/92.shtml>"},{"code":1610,"name":"vanadium","parent":1427,"scope":"Metal element with symbol V and atomic number 23 <http:\/\/periodic.lanl.gov\/23.shtml>"},{"code":1613,"name":"xenon","parent":1427,"scope":"Noble gas element with symbol Xe and atomic number 54 <http:\/\/periodic.lanl.gov\/54.shtml>"},{"code":1616,"name":"ytterbium","parent":1427,"scope":"Rare earth (lanthanide series) element with symbol Yb and atomic number 70 <http:\/\/periodic.lanl.gov\/70.shtml>"},{"code":1617,"name":"yttrium","parent":1427,"scope":"Metal element with symbol Y and atomic number 39 <http:\/\/periodic.lanl.gov\/39.shtml>"},{"code":1618,"name":"zinc","parent":1427,"scope":"Metal element with symbol Zn and atomic number 30 <http:\/\/periodic.lanl.gov\/30.shtml>"},{"code":1619,"name":"zirconium","parent":1427,"scope":"Metal element with symbol Zr and atomic number 40 <http:\/\/periodic.lanl.gov\/40.shtml>"}],"rt":[]}