Major phases in the history of theories and views about the structure of the atom.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
This animation shows the electron configuration of the calcium atom.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
A phase transition is the change of a substance from one state of matter to another.
This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
Energy released during nuclear fission can be used for civilian or military purposes.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.
The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...
Human activity increases the greenhouse effect and leads to global warming.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of various compounds.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
The design and structure of modern houses play an important role in environmental protection.
Limestone is a widely and diversely used material.
One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that exists only in aqueous solution.
A compound formed as white smoke during the combustion of phosphorus.
The solution of hydrogen chloride in water is called hydrochloric acid.
The dissolution of zinc in hydrochloric acid produces hydrogen gas.