| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
hydrogen
Hydrogen: The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.. dihydrogen : An elemental molecule consisting of two hydrogens joined by a single bond. | 1.98 | 1 | 0 | elemental hydrogen;
elemental molecule;
gas molecular entity | antioxidant;
electron donor;
food packaging gas;
fuel;
human metabolite |
sodium iodide
Sodium Iodide: A compound forming white, odorless deliquescent crystals and used as iodine supplement, expectorant or in its radioactive (I-131) form as an diagnostic aid, particularly for thyroid function tests.. sodium iodide : A metal iodide salt with a Na(+) counterion. | 2.38 | 2 | 0 | inorganic sodium salt;
iodide salt | |
lutetium
Lutetium: An element of the rare earth family of metals. It has the atomic symbol Lu, atomic number 71, and atomic weight 175. | 2.82 | 3 | 0 | d-block element atom;
lanthanoid atom | |
erbium
Erbium: Erbium. An element of the rare earth family of metals. It has the atomic symbol Er, atomic number 68, and atomic weight 167.26. | 2.74 | 3 | 0 | f-block element atom;
lanthanoid atom | |
ytterbium
Ytterbium: An element of the rare earth family of metals. It has the atomic symbol Yb, atomic number 70, and atomic weight 173. Ytterbium has been used in lasers and as a portable x-ray source. | 2.46 | 2 | 0 | f-block element atom;
lanthanoid atom | |
yttrium
Yttrium: An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers. | 2.5 | 2 | 0 | d-block element atom;
rare earth metal atom;
scandium group element atom | |
chlorine
Chlorine: An element with atomic symbol Cl, atomic number 17, and atomic weight 35, and member of the halogen family. | 2.38 | 2 | 0 | diatomic chlorine;
gas molecular entity | bleaching agent |
fluorides
[no description available] | 1.97 | 1 | 0 | halide anion;
monoatomic fluorine | |
barium fluoride
barium fluoride: detector material used in position emission tomography (PET) cameras | 1.97 | 1 | 0 | | |
fluorodeoxyglucose f18
Fluorodeoxyglucose F18: The compound is given by intravenous injection to do POSITRON-EMISSION TOMOGRAPHY for the assessment of cerebral and myocardial glucose metabolism in various physiological or pathological states including stroke and myocardial ischemia. It is also employed for the detection of malignant tumors including those of the brain, liver, and thyroid gland. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1162) | 2.48 | 2 | 0 | 2-deoxy-2-((18)F)fluoro-D-glucose;
2-deoxy-2-fluoro-aldehydo-D-glucose | |
cadmium telluride
cadmium telluride: used in radiation monitoring device | 2.05 | 1 | 0 | | |
lead
Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb. | 2.47 | 2 | 0 | carbon group element atom;
elemental lead;
metal atom | neurotoxin |
cesium
Cesium: A member of the alkali metals. It has an atomic symbol Cs, atomic number 50, and atomic weight 132.91. Cesium has many industrial applications, including the construction of atomic clocks based on its atomic vibrational frequency. | 2.06 | 1 | 0 | alkali metal atom | |
barium
Barium: An element of the alkaline earth group of metals. It has an atomic symbol Ba, atomic number 56, and atomic weight 138. All of its acid-soluble salts are poisonous. | 1.97 | 1 | 0 | alkaline earth metal atom;
elemental barium | |
bismuth
Bismuth: A metallic element that has the atomic symbol Bi, and atomic number 83. Its principal isotope is Bismuth 209. | 11.36 | 37 | 1 | metal atom;
pnictogen | |
thallium
Thallium: A heavy, bluish white metal, atomic number 81, atomic weight [204.382; 204.385], symbol Tl.. thallium : A metallic element first identified and named from the brilliant green line in its flame spectrum (from Greek thetaalphalambdalambdaomicronsigma, a green shoot). | 2.06 | 1 | 0 | boron group element atom | |
arsenic
Arsenic: A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed) | 2.03 | 1 | 0 | metalloid atom;
pnictogen | micronutrient |
beryllium
Beryllium: An element with the atomic symbol Be, atomic number 4, and atomic weight 9.01218. Short exposure to this element can lead to a type of poisoning known as BERYLLIOSIS.. beryllium atom : Alkaline earth metal atom with atomic number 4. | 2.1 | 1 | 0 | alkaline earth metal atom;
elemental beryllium;
metal allergen | adjuvant;
carcinogenic agent;
epitope |
silicon
Silicon: A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086]. | 2.86 | 3 | 0 | carbon group element atom;
metalloid atom;
nonmetal atom | |
germanium
Germanium: A rare metal element with a blue-gray appearance and atomic symbol Ge, atomic number 32, and atomic weight 72.63. | 11.36 | 37 | 1 | carbon group element atom;
metalloid atom;
nonmetal atom | |
tellurium
Tellurium: An element that is a member of the chalcogen family. It has the atomic symbol Te, atomic number 52, and atomic weight 127.60. It has been used as a coloring agent and in the manufacture of electrical equipment. Exposure may cause nausea, vomiting, and CNS depression. | 2.05 | 1 | 0 | chalcogen;
metalloid atom | |
yttrium silicate
yttrium silicate: RN given refers to cpd with unknown MF | 2.04 | 1 | 0 | | |
lutetium orthosilicate
lutetium orthosilicate: LSO crystal layer is used in High Resolution Research Tomograph (HRRT) positron emission tomography (PET) scanners | 2.5 | 2 | 0 | | |