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On 28 March 2008, Plus jeden deň protested against a law which it said would curb freedom of the press by publishing a paper with its front page blank except for a summary of criticisms of the proposed regulation. [3] The legislation arose out of a European Union treaty and was controversial when proposed in the parliament in Slovakia. [3] When the law passed, the paper again printed a blank ...
List of mathematical abbreviations This following list features abbreviated names of mathematical functions, function-like operators and other mathematical terminology.
Na 2 Se + H 2 O → NaHSe + NaOH. Similarly, sodium selenide is readily oxidized to polyselenides, a conversion signaled by off-white samples. Sodium selenide reacts with acids to produce toxic hydrogen selenide gas. Na 2 Se + 2 HCl → H 2 Se + 2 NaCl. The compound reacts with electrophiles to produce the selenium compounds.
Sodium periodate is an inorganic salt, composed of a sodium cation and the periodate anion. It may also be regarded as the sodium salt of periodic acid. Like many periodates, it can exist in two different forms: sodium metaperiodate (formula NaIO 4) and sodium orthoperiodate (normally Na 2 H 3 IO 6, but sometimes the fully reacted salt Na 5 IO 6 ). Both salts are useful oxidising agents. [2]
Hydrogen selenide is an inorganic compound with the formula H 2 Se. This hydrogen chalcogenide is the simplest and most commonly encountered hydride of selenium. H 2 Se is a colorless, flammable gas under standard conditions. It is the most toxic selenium compound [3] with an exposure limit of 0.05 ppm over an 8-hour period. [4] [5] Even at extremely low concentrations, this compound has a ...
There are 2 extinct species in Slovakia ( locally extinct ): Theodoxus transversalis and Esperiana esperi. [citation needed] There are endemic species of molluscs in Slovakia: Alzoniella slovenica in Slovakia (and in Moravia in the Czech Republic too) Alopia bielzii clathrata (Rossmässler, 1857) Deroceras fatrense.
The 10.5 cm SK C/32 ( SK - Schiffskanone (ship board cannon) C - Construktionsjahr (year of design), was a widely used German naval gun on a variety of Kriegsmarine ships during World War II. Originally designed as a surface weapon, it was used in a number of other roles such as anti-aircraft and coastal defence; wet-mounts were developed for U-boats.
Sodium hydroselenide is an inorganic compound with the chemical formula Na Se H. It is a salt of hydrogen selenide. It consist of sodium cations Na+ and hydroselenide anions −SeH. Each unit consists of one sodium, one selenium, and one hydrogen atom. Sodium hydroselenide is a selenium analog of sodium hydroxide NaOH.