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This animation shows the electron configuration of the calcium atom.
The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...
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.
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.
A phase transition is the change of a substance from one state of matter to another.
Major phases in the history of theories and views about the structure of the atom.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
Metals forming hexagonal metallic lattices are rigid and difficult to machine.
A compound formed as white smoke during the combustion of phosphorus.
Fatty acid molecules consist of a polar head and a non-polar tail, therefore they are suitable for removing fat stains.
One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that exists only in aqueous solution.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.
Hydrogen atoms within hydrogen molecules are held together by a covalent bond.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
Colourless, moderate acid, only known in aqueous solution.