Periodic Table of Elements Glossary
Science / Periodic Table of Elements Glossary
Rubidium (Rb): Atomic number: 37, Atomic mass: 85.4678 g.mol -1, Electronegativity: 0.8, Density: 1.53 g.cm-3 at 20°C, Melting point: 39 °C, Boiling point: 696 °C, Vanderwaals radius: 0.243 nm, Ionic radiu . . . View Full Definition
Ruthenium (Ru): Atomic number: 44, Atomic mass: 101.1 g.mol -1, Electronegativity: 2.2, Density: 12.2 g.cm-3 at 20°C, Melting point: 2250 °C, Boiling point: 4150 °C, Vanderwaals radius: 0.135 nm, Isotopes: . . . View Full Definition
Rutherfordium (Rf): Atomic number: 104, Atomic mass: 260.9 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unkn . . . View Full Definition
Samarium (Sm): Atomic number: 62 Atomic mass: 150.35 g.mol -1 Electronegativity: 1.2 Density: 6.9 g.cm-3 at 20°C Melting point: 1072 °C Boiling point: 1790 °C Vanderwaals radius: unknown Ionic radius: unkn . . . View Full Definition
Scandium (Sc): Atomic number: 21, Atomic mass: 44.9559 g.mol -1, Electronegativity: unknown, Density: 3.0 g.cm-3 at 20°C, Melting point: 1541 °C, Boiling point: 2836 °C, Vanderwaals radius: 0.161 nm, Ionic . . . View Full Definition
Seaborgium (Sg): Atomic number: 106, Atomic mass: 262.94 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unk . . . View Full Definition
Second Ionization Energy: The energy needed to remove an electron from an isolated +1 ion. The third ionization energy would be the energy required to remove an electron from an isolated +2 ion, and so on.
Selenium (Se): Atomic number: 34, Atomic mass: 78.96 g.mol -1, Electronegativity: 2.4, Density: 4.79 g.cm-3 at 20°C, Melting point: 217 °C, Boiling point: 688 °C, Vanderwaals radius: 0.14 nm, Ionic radius: . . . View Full Definition
Silicon (Si): Atomic number: 14, Atomic mass: 28.0855 g.mol -1, Electronegativity: 1.8, Density: 2.33 g.cm -3 at 20 °C, Melting point: 1410 °C, Boiling point: 3265 °C, Vanderwaals radius: 0.132 nm, Ionic . . . View Full Definition
Silver (Ag): Atomic number: 47, Atomic mass: 107.87 g.mol -1, Electronegativity: 1.9, Density: 10.5 g.cm-3 at 20°C, Melting point: 962 °C, Boiling point: 2212 °C, Vanderwaals radius: 0.144 nm, Ionic radi . . . View Full Definition
Sodium (Na): Atomic number: 11, Atomic mass: 22.98977 g.mol -1, Electronegativity: 0.9, Density: 0.97 g.cm -3 at 20 °C, Melting point: 97.5 °C, Boiling point: 883 °C, Vanderwaals radius: 0.196 nm, Ionic . . . View Full Definition
Strontium (Sr): Atomic number: 38, Atomic mass: 87.62 g.mol -1, Electronegativity: 1.0, Density: 2.6 g.cm-3 at 20°C, Melting point: 769 °C, Boiling point: 1384 °C, Vanderwaals radius: 0.215 nm, Ionic radius . . . View Full Definition
Sulfur (S): Atomic number: 16, Atomic mass: 32.06 g.mol -1, Electronegativity: 2.5, Density: 2.07 g.cm -3 at 20 °C, Melting point: 113 °C, Boiling point: 445 °C, Vanderwaals radius: 0.127 nm, Ionic radi . . . View Full Definition
Tantalum (Ta): Atomic number: 73, Atomic mass: 180.95 g.mol -1, Electronegativity: 1.5, Density: 16.69 g.cm-3 at 20°C, Melting point: 2850 °C, Boiling point: 6000 °C, Vanderwaals radius: 0.1425 nm, Ionic r . . . View Full Definition
Technetium (Tc): Atomic number: 43, Atomic mass: (99) g.mol -1, Electronegativity: 1.9, Density: 11.5 g.cm-3 at 20°C, Melting point: 2200 oC, Boiling point: 4877 oC, Vanderwaals radius: 0.128 nm, Isotopes: 9 . . . View Full Definition
Tellurium (Te): Atomic number: 52, Atomic mass: 127.6 g.mol -1, Electronegativity: 2.1, Density: 6.24 g.cm-3, Melting point: 450 °C, Boiling point: 1390 °C, Vanderwaals radius: 0.137 nm, Ionic radius: 0.221 . . . View Full Definition
Terbium (Tb): Atomic number: 65, Atomic mass: 158.92534 g.mol -1, Electronegativity: 1.2, Density: 8.3 g.cm-3 at 20°C, Melting point: 1360 °C, Boiling point: 3041 °C, Vanderwaals radius: unknown, Ionic ra . . . View Full Definition
Thallium (Tl): Atomic number: 81, Atomic mass: 204.383 g.mol -1, Electronegativity: 1.8, Density: 11.71 g.cm-3 at 20°C, Melting point: 304 °C, Boiling point: 1473 °C, Vanderwaals radius: 0.182 nm, Ionic ra . . . View Full Definition
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