Periodic Table of Elements Glossary
Science / Periodic Table of Elements Glossary
Darmstadtium (Ds): Atomic number: 110, Atomic mass: 261.9 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unkn . . . View Full Definition
Dubnium (Db): Atomic number: 105, Atomic mass: 261.9 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unkn . . . View Full Definition
Dysprosium (Dy): Atomic number: 66, Atomic mass: 162.50 g.mol -1, Electronegativity: 1.2, Density: 8.6 g.cm-3 at 20°C, Melting point: 1412 °C, Boiling point: 2562 °C, Vanderwaals radius: unknown, Ionic radiu . . . View Full Definition
Einsteinium (Es): Atomic number: 99, Atomic mass: 254 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unknown . . . View Full Definition
Electron Configuration: The distribution of electrons according to the energy sublevels (subshells) in uncharged atoms. The noble gas shown in square brackets (e.g. [He]), marks that all the subshells associated wi . . . View Full Definition
Erbium (Er): Atomic number: 68, Atomic mass: 167.26 g.mol -1, Electronegativity: 1.2, Density: 9.2 g.cm-3 at 20°C, Melting point: 1522 °C, Boiling point: 2510 °C, Vanderwaals radius: unknown, Ionic radiu . . . View Full Definition
Europium (Eu): Atomic number: 63, Atomic mass: 167.26 g.mol -1, Electronegativity: 1.2, Density: 9.2 g.cm-3 at 20°C, Melting point: 1522 °C, Boiling point: 2510 °C, Vanderwaals radius: unknown, Ionic radiu . . . View Full Definition
Fermium (Fm): Atomic number: 100, Atomic mass: (257) g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unkn . . . View Full Definition
First Ionization Energy: The energy needed to remove an electron from an isolated, neutral atom.
Fluorine (F): Atomic number: 9, Atomic mass: 18.998403 g.mol -1, Electronegativity: 4, Density: 1.8*10-3 g.cm-3 at 20°C, Melting point: -219.6 °C, Boiling point: -188 °C, Vanderwaals radius: 0.135 nm, Ion . . . View Full Definition
Francium (Fr): Atomic number: 87, Atomic mass: (233) g.mol -1, Electronegativity: 0.7, Density: unknown, Melting point: 27 °C, Boiling point: 677 °C, Vanderwaals radius: unknown, Ionic radius: unknown, Iso . . . View Full Definition
Gadolinium (Gd): Atomic number: 64, Atomic mass: 157.25 g.mol -1, Electronegativity: 1.1, Density: 7.9 g.cm-3 at 20°C, Melting point: 1313 °C, Boiling point: 3266 °C, Vanderwaals radius: unknown, Ionic radiu . . . View Full Definition
Gallium (Ga): Atomic number: 31, Atomic mass: 69.72 g.mol -1, Electronegativity: unknown, Density: 5.1 g.cm-3 at 20°C, Melting point: 29.8 °C, Boiling point: 2204 °C, Vanderwaals radius: 0.161 nm, Ionic r . . . View Full Definition
Germanium (Ge): Atomic number: 32, Atomic mass: 72.59 g.mol -1, Electronegativity: 1.8, Density: 5.3 g.cm-3 at 20°C, Melting point: 937 °C, Boiling point: 2830 °C, Vanderwaals radius: 0.137 nm, Ionic radius . . . View Full Definition
Gold (Au): Atomic number: 79, Atomic mass: 196.9655 g.mol -1, Electronegativity ccording to Pauling: 2.4, Density: 19.3 g.cm-3 at 20°C, Melting point: 1062 °C, Boiling point: 2000 °C, Vanderwaals radiu . . . View Full Definition
Group: 1. A substructure that imparts characteristic chemical behaviors to a molecule, for example, a carboxylic acid group. (also: functional group). 2. A vertical column on the periodic table, fo . . . View Full Definition
Hafnium (Hf): Atomic number: 72, Atomic mass: 178.49 g.mol -1, Electronegativity: 1.3, Density: 13.07 g.cm-3 at 20°C, Melting point: 2200 °C, Boiling point: 5200 °C, Vanderwaals radius: 0.161 nm, Ionic ra . . . View Full Definition
Halogen: An element of group VIIA (a. k. a. Group 18). The name means 'salt former'; halogens react with metals to form binary ionic compounds. Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), . . . View Full Definition
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