]> 2.0 Elements of the Periodic Table Ontology (primitive) Michel Dumontier Dumontier Lab An ontology of the periodic table elements. application/rdf+xml en 2007-10-01 One of 15 elements that lie between actinium and lawrencium on the periodic table, with atomic numbers 89 - 103. actinide A an element of group 1 (IUPAC style) of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). alkali metal alkaline earth metal An element of Group 2 (IUPAC style) of the periodic table: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). An element of the periodic table for which, in the atomic ground state, the highest-energy electrons occupy some orbital. periodic block boron group element An element in group 13 (IUPAC style) of the periodic table. An element in group 14 (IUPAC style) of the periodic table. carbon group element chalcogen An element of Group 16 in the periodic table. It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), the radioactive polonium (Po), and the synthetic ununhexium (Uuh). d-block element An element of the periodic table for which, in the atomic ground state, the highest-energy electrons occupy d-orbitals. f-block element An element of the periodic table for which, in the atomic ground state, the highest-energy electrons occupy f-orbitals. g-block element An element of the periodic table for which, in the atomic ground state, the highest-energy electrons occupy g-orbitals. halogen An element from Group 17 of the periodic table: fluorine, F, chlorine, Cl, bromine, Br, iodine, I, astatine, At. lanthanide An element with atomic number between 57 and 71. An element with properties between a metal and non-metal. metalloid Element of group 15. nitrogen group element noble gas An element of group 18 of the periodic table with the maximum number of valence electrons their outer shell can hold. One of Hydrogen (H), Carbon (C), Group 15, Nitrogen (N), Phosphorus (P), Oxygen (O), Sulfur (S), Selenium (Se), the halogens and the noble gases. non metal An element of the periodic table for which, in the atomic ground state, the highest-energy electrons occupy p-orbitals. p-block element An element in the first row (or period) of the periodic table of the elements. period 1 element period 2 element An element in the second row (or period) of the periodic table of the elements. period 3 element An element in the third row (or period) of the periodic table of the elements. period 4 element An element in the fourth row (or period) of the periodic table of the elements. An element in the fifth row (or period) of the periodic table of the elements. period 5 element period 6 element An element in the sixth row (or period) of the periodic table of the elements. period 7 element An element in the seventh row (or period) of the periodic table of the elements. An element of a horizontal row of the periodic table that shares the same number of electron shells. Each shell is divided into different subshells, which as atomic number increases are filled in roughly this order: 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p 8s 5g 6f 7d 8p period element Element of group 10. group 10 element group 11 element Element of group 11. group 12 element Element of group 12 group 13 element Element of group 13 Each of the elements in this group has 4 electrons in its outer energy level. group 14 element group 15 element Element of group 15 group 16 element Element of group 16 group 17 element Element of group 17 Element of group 18. group 18 element group 1 element Element of group 1. group 2 element Element of group 2. group 3 element Element of group 3. Element of group 4. group 4 element Element of group 5. group 5 element group 6 element Element of group 6. Element of group 7. group 7 element Element of group 8. group 8 element group 9 element Element of group 9. An element having similar configurations of the outermost electron shells of their atoms of the chemical elements. group element An element of the periodic table of elements. periodic table element An element of Aluminum, gallium, tin, lead, bismuth, thallium or indium. poor metal An element distinguished by the property that in the atomic ground state, the highest-energy electron is in an s-orbital. s-block element series element An element whose physical and chemical characteristics vary progressively within a series. transition metal An element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell.