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Vor 2 Tagen · Formaldehyde ( / fɔːrˈmældɪhaɪd / ⓘ for-MAL-di-hide, US also / fər -/ ⓘ fər-) ( systematic name methanal) is an organic compound with the chemical formula CH2O and structure H−CHO, more precisely H2C=O. The compound is a pungent, colourless gas that polymerises spontaneously into paraformaldehyde.
Vor einem Tag · A metal (from Ancient Greek μέταλλον (métallon) 'mine, quarry, metal') is a material that when polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not. [1] : .
Vor 2 Tagen · Bismuth is a chemical element; it has symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs naturally, and its sulfide and oxide forms are important commercial ores.
Vor 2 Tagen · Gold ist ein gelbglänzendes Metall und steht im Periodensystem in der 1. Nebengruppe (Gruppe 11), zusammen mit Kupfer und Silber, der Kupfergruppe. Die drei Metalle werden auch als Münzmetalle bezeichnet. Gold gehört zu den Übergangsmetallen . Gold wird mindestens seit sechs Jahrtausenden für rituelle Gegenstände und Schmuck sowie seit dem 6.
Vor 5 Tagen · Strong adhesive glue can make the difference between a job well done and a sticky mess. But with so many options on the market, how can you be sure you're choosing the strongest glue for the task at hand? This guide will walk you through the essentials of picking the strongest adhesive glue, ensuring your projects hold together under ...
Vor 18 Stunden · The Aragonese king died from a combination of indigestion and uncontrollable laughing. According to legend, Martin was suffering from indigestion, caused by eating an entire goose, when his favorite jester, Borra, entered the king's bedroom.
Vor 4 Tagen · Less than 48 hours after President Joe Biden’s alarming debate performance, the Democratic donor class is in crisis, racked by anxiety over what — if anything — the party’s wealthiest ...
