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 Glossaire
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| RÉDACTEURS: |
 AnglaisAditya Vardhan Eni Generalic |
 FrançaisMichel Ditria |
 CroateEni Generalic Marija Bralic Slobodan Brinic |
 AllemandMarc Hens |
 Italienrédacteurs recherchés |
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S |
Salinity | Second | SI units | Standard reduction potential | Standard state | Steradian | Stoichiometric number |
- Salinity
- Salinity (S) is a parameter used in oceanography to describe the concentration of dissolved salts in seawater. It is defined in terms of electrical conductivity relative to a standard solution of KCl. When expressed in units of parts per thousand, S may be roughly equated to the concentration of dissolved material in grams per kilogram of seawater.
- Second
- Second, the SI base unit of time, is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom (133Cs).
- SI units
- The International System of Units adopted in 1960 and recommended for use in all scientific and technical fields.
- Standard reduction potential
- Standard reduction potential (E°) is the zero-current potential of a cell in which the specified reduction reaction occurs at the right-hand electrode and the left-hand electrode is the standard hydrogen electrode. Also called Standard electrode potential.
- Standard state
- Standard state is depend from the melting and boiling points of the element. Elements must be in three state: gas, solid, or liquid.
- Steradian
- Steradian is the solid angle that, having its vertex in the center of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere.
- Stoichiometric number
- Stoichiometric number (n) is the number appearing before the symbol for each compound in the equation for a chemical reaction. By convention, it is negative for reactants and positive for products.
