Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water.Solutions of HF are colourless, acidic and highly corrosive.It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).
The periodic table is an arrangement of the chemical elements, structured by their atomic number, electron configuration and recurring chemical properties.In the basic form, elements are presented in order of increasing atomic number, in the reading sequence.
Nonmetal 1 3 Ethanol: Liquid 250 750: Gasoline: Liquid 317 950: Glass: Glass 8.5 25.5 Borosilicate glass: Glass 3.3 : 9.9 matched sealing partner for tungsten, molybdenum and kovar. Glycerine: Liquid 485: Gold: Metal 14 42 Granite: Rock 35-43 105-129 Ice: Nonmetal 51 Invar: 1.2 3.6 Iron: Metal 11.8 35.4 Kapton: 20: 60 DuPont Kapton 200EN Lead ...
In the simplest case, the cation is a metal atom and the anion is a nonmetal atom, but these ions can be of a more complex nature, e.g. molecular ions like NH + 4 or SO 2− 4. In simpler words, an ionic bond results from the transfer of electrons from a metal to a non-metal in order to obtain a full valence shell for both atoms.
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery.
O 2 F 2 precipitates as a brown solid upon the UV irradiation of a mixture of liquid O 2 and F 2 at −196 °C. It also only appears to be stable below −160 °C. The general method of preparation of many oxygen fluorides is a gas-phase electric discharge in cold containers including O 2 F 2.
Hydrobromic acid is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water. "Constant boiling" hydrobromic acid is an aqueous solution that distills at 124.3 °C (255.7 °F) and contains 47.6% HBr by mass, which is 8.77 mol/L. Hydrobromic acid has a pK a of −9, making it a stronger acid than hydrochloric acid, but not as strong as hydroiodic acid.