| 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. | 2.5 | 2 | 0 | elemental hydrogen;
elemental molecule;
gas molecular entity | antioxidant;
electron donor;
food packaging gas;
fuel;
human metabolite |
n-vinyl-2-pyrrolidinone
N-vinyl-2-pyrrolidinone: monomer of POVIDONE; structure given in first source | 2.21 | 1 | 0 | pyrrolidin-2-ones | |
europium
Europium: An element of the rare earth family of metals. It has the atomic symbol Eu, atomic number 63, and atomic weight 152. Europium is used in the form of its salts as coatings for cathode ray tubes and in the form of its organic derivatives as shift reagents in NMR spectroscopy. | 2.1 | 1 | 0 | f-block element atom;
lanthanoid atom | |
lead
Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb. | 2.07 | 1 | 0 | carbon group element atom;
elemental lead;
metal atom | neurotoxin |
boron
Boron: A trace element with the atomic symbol B, atomic number 5, and atomic weight [10.806; 10.821]. Boron-10, an isotope of boron, is used as a neutron absorber in BORON NEUTRON CAPTURE THERAPY. | 2.41 | 2 | 0 | boron group element atom;
metalloid atom;
nonmetal atom | micronutrient |