{"thcode":2,"term":{"code":1467,"name":"halogen 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":1398,"name":"astatine","parent":1427,"scope":"Halogen element with symbol At and atomic number 85 <http:\/\/periodic.lanl.gov\/85.shtml>"},{"code":1414,"name":"bromine","parent":1427,"scope":"Halogen element with symbol Br and atomic number 35 <http:\/\/periodic.lanl.gov\/35.shtml>"},{"code":1428,"name":"chlorine","parent":1427,"scope":"Halogen element with symbol Cl and atomic number 17 <http:\/\/periodic.lanl.gov\/17.shtml>"},{"code":1454,"name":"fluorine","parent":1427,"scope":"Halogen element with symbol F and atomic number 9 <http:\/\/periodic.lanl.gov\/9.shtml>"},{"code":1481,"name":"iodine","parent":1427,"scope":"Halogen element with symbol I and atomic number 53 <http:\/\/periodic.lanl.gov\/53.shtml>"}]}