Major phases in the history of theories and views about the structure of the atom.
The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
Energy released during nuclear fission can be used for civilian or military purposes.
Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.
This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
A phase transition is the transformation of a substance from one state of matter to another.
This animation shows the electron configuration of the calcium atom.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
In benzene there are sigma bonds and delocalized pi bonds between carbon atoms.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
Human activity increases the greenhouse effect and leads to global warming.
Colorless, moderate acid, only known in aqueous solution.
The design and structure of modern houses play an important role in environmental protection.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
Polymerized ethylene is known as polyethylene, a type of plastic.
Raw iron is produced from iron ore in iron smelters.
Limestone is a widely and diversely used material.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.
Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.