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The ammonium cation has very similar properties to the heavier alkali metal cations and is often considered a close equivalent. [18] [19] [20] Ammonium is expected to behave as a metal ([NH 4] + ions in a sea of electrons) at very high pressures, such as inside giant planets such as Uranus and Neptune. [19] [20]
Similar, but slightly more complex, many materials which are (nonmetal) semiconductors behave like metals when they contain a high concentration of dopants, being called degenerate semiconductors. [24] A general introduction to much of this can be found in the 2017 book by Fumiko Yonezawa [2]: Chpt 1
Ammonia is found throughout the Solar System on Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, among other places: on smaller, icy bodies such as Pluto, ammonia can act as a geologically important antifreeze, as a mixture of water and ammonia can have a melting point as low as −100 °C (−148 °F; 173 K) if the ammonia concentration is ...
Pages in category "Ammonium compounds" The following 136 pages are in this category, out of 136 total. This list may not reflect recent changes. * Ammonium;
Ammonium chloride is an inorganic chemical compound with the chemical formula N H 4 Cl, also written as [NH 4]Cl. It is an ammonium salt of hydrogen chloride . It consists of ammonium cations [NH 4 ] + and chloride anions Cl − .
Amateur chemistry or home chemistry is the pursuit of chemistry as a private hobby. [1] Amateur chemistry is usually done with whatever chemicals are available at disposal at the privacy of one's home. It should not be confused with clandestine chemistry, which involves the illicit production of controlled drugs.
Many trivalent metals are capable of forming alums. The general form of an alum is XY (SO 4) 2 · n H 2 O, where X is an alkali metal or ammonium, Y is a trivalent metal, and n often is 12. The most important example is chrome alum, KCr(SO 4) 2 ·12 H 2 O, a dark violet crystalline double sulfate of chromium and potassium, was used in tanning.
Nonmetals show more variability in their properties than do metals. [1] Metalloids are included here since they behave predominately as chemically weak nonmetals.. Physically, they nearly all exist as diatomic or monatomic gases, or polyatomic solids having more substantial (open-packed) forms and relatively small atomic radii, unlike metals, which are nearly all solid and close-packed, and ...