Glossary S
Deutsch: Natrium / Español: Sodio / Português: Sódio / Français: Sodium / Italiano: Sodio
Sodium is a chemical element with the symbol Na (from Latin: natrium) and atomic number 11. It is a soft, silver-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. The free metal does not occur in nature, but instead must be prepared from its compounds; it was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide.
Deutsch: Zeitplan / Español: Horario / Português: Cronograma / Français: Programme / Italiano: Programma /
Schedule may refer to a timetable or broadcast programming.
Deutsch: Bach / Español: Arroyo / Português: Córrego / Français: Ruisseau / Italiano: Ruscello
A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill (occasionally ghyll), kill, lick, mill race, rill, river, syke, bayou, rivulet, streamage, wash, run or runnel.
Deutsch: Spirale / Español: Espiral / Português: Espiral / Français: Spirale / Italiano: Spirale
In mathematics, a spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point.