Science / Chemistry / Solubility: The solubility of a substance is its concentration in a saturated solution. Substances with solubilities much less than 1 g/100 ml of solvent are usually considered insoluble. The solubility is sometimes called 'equilibrium solubility' because the rates at which solute dissolves and is deposited out of solution are equal at this concentration.

Solubility Product

Science / Chemistry / Solubility Product: The equilibrium constant for a reaction in which a solid ionic compound dissolves to give its constituent ions in solution. MORE

Phosphorus (P)

Science / Periodic Table of Elements / Phosphorus (P): Atomic number: 15, Atomic mass: 30,9738 g.mol -1, Oxidation states: ± 3, 4, 5, Electronegativity: 2,1, Density: 1,82 g/ml at 20°C, Melting point: 44,2 °C, Boiling point: 280 °C, Vanderwaals radius MORE

Helium (He)

Science / Periodic Table of Elements / Helium (He): Atomic number: 2, Atomic mass: 4.00260 g.mol -1, Electronegativity: unknown, Density: 0.178*10 -3 -3 at 20 °C, Melting point: - 272.2 (26 atm) °C, Boiling point: - 268.9 °C, Vanderwaals radius MORE