A reddish-brown toxic gas, very reactive due to its unpaired electron.
A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in certain mineral waters and spring waters.
It is also used as a food additive, limescale and rust remover.
The simplest aromatic amine. Its scientific name is phenylamine.
One of the hydrogen halides, it is used for the production of alkyl bromides.
One of the oxides of sulphur, forms sulphuric acid with water.
The sixth member in the homologous series of straight-chain alkanes.
A component of DNA, it contains one less hydroxyl group than β-D-ribose.
A polymorphic compound, mostly found in the form of quartz.
As a milestone in the history of aviation, Oszkár Asboth´s first helicopter made its first flight in 1928.
Pit houses were typical dwellings in the Arpad era.
A white, crystalline compound that breaks down when affected by light.
Hypochlorite ions are formed when water is disinfected with chlorine.
A helical molecule consisting of alpha-D-glucose units. It is one of the basic components of starch.
Alpha-D-glucose is one of the stereoisomers of glucoses, specifically the D-glucoses.
A colourless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.
A light yellow compound formed in the reaction of silver nitrate and potassium iodide.
Common salt (or table salt) is one of the most important sodium compounds, indispensable for living organisms.
A white, crystalline compound which breaks down when exposed to light.
Halogen elements are a group in the periodic table consisting of five chemically related elements, fluorine, chlorine, bromine, iodine, and astatine.
