{"thcode":2,"term":{"code":1388,"name":"alkali metal elements","parent":1426,"scope":null},"uf":[],"bt":[{"code":1426,"name":"chemical element groups","parent":1382,"scope":"Groups shown at <http:\/\/periodic.lanl.gov\/>"},{"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":[],"rt":[{"code":1424,"name":"cesium","parent":1427,"scope":"Alkali metal element with symbol Cs and atomic number 55 <http:\/\/periodic.lanl.gov\/55.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":1476,"name":"hydrogen","parent":1427,"scope":"Alkali metal element with symbol H and atomic number 1 <http:\/\/periodic.lanl.gov\/1.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":1543,"name":"potassium","parent":1427,"scope":"Alkali metal element with symbol K and atomic number 19 <http:\/\/periodic.lanl.gov\/19.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":1579,"name":"sodium","parent":1427,"scope":"Alkali metal element with symbol Na and atomic number 11 <http:\/\/periodic.lanl.gov\/11.shtml>"}]}