General chemistry

General chemistry

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General chemistry

corrosion

Chemistry; General chemistry

Corrosion is a reaction that involves action of an oxidizing agent on a metal. The oxidizing agent is often oxygen dissolved in water. See How Iron Rusts for examples.

lanthanide

Chemistry; General chemistry

Elements 57-70 are called lanthanides. Electrons added during the Aufbau construction of lanthanide atoms go into the 4f subshell.

siemens

Chemistry; General chemistry

The SI unit of electrical conductance . A material has a conductance of one siemens if one ampere of electric current can pass through it per volt of electric potential .

ammonia

Chemistry; General chemistry

Pure NH3 is a colorless gas with a sharp, characteristic odor. It is easily liquified by pressure, and is very soluble in water. Ammonia acts as a weak base . Aqueous solutions of ammonia are ...

enzyme

Chemistry; General chemistry

Protein or protein-based molecules that speed up chemical reactions occurring in living things. Enzymes act as catalysts for a single reaction, converting a specific set of reactants (called ...

The process of providing sites for 1) new bubbles to form in a liquid that is boiling or supersaturated with gas; 2) new droplets to condense from a supersaturated vapor, or 3) new crystals to form ...

transuranium element

Chemistry; General chemistry

An element with an atomic number higher than 92 (uranium's atomic number). Transuranium elements are unstable and occur in extremely low concentrations (if at all) in nature. Most are made ...