Science / Periodic Table of Elements / Helium (He): Atomic number: 2, Atomic mass: 4.00260 g.mol -1, Electronegativity: unknown, Density: 0.178*10 -3 g.cm -3 at 20 ?°C, Melting point: - 272.2 (26 atm) ?°C, Boiling point: - 268.9 ?°C, Vanderwaals rad MORE
Science / Periodic Table of Elements / Berkelium (Bk): Atomic number: 97, Atomic mass: (247) g.mol -1, Electronegativity: unknown, Density: 14 g.cm3 at 20?°C, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unkn MORE
Science / Periodic Table of Elements / Californium (Cf): Atomic number: 98, Atomic mass: (251) g.mol -1, Electronegativity accordin to Pauling: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic rad MORE
Science / Periodic Table of Elements / Curium (Cm): Atomic number: 96, Atomic mass: (247) g.mol -1, Electronegativity: unknown, Density: 13.51 g.cm-3 at 20?°C, Melting point: 1340 ?°C, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius MORE
Health / Dentistry / Dehiscence: (a)Implant Dehiscence, a splitting open, a break in the covering epithelium leaving an isolated area of an implant exposed to the oral cavity. (b)Mandibular Dehiscence, exposure of inferior alveolar n MORE
Science / Periodic Table of Elements / Oxygen (O): Atomic number: 8, Atomic mass: 15.999 g.mol -1, Electronegativity: 3.5, Density: 1.429 kg/m3 at 20?°C, Melting point: -219 ?°C, Boiling point: -183 ?°C, Vanderwaals radius: 0.074 nm, Ionic radius: MORE