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Carbon has 4 electrons in its outer shell, a pair in the 2s and two unpaired electrons in the 2p. For covalent bonds to form, each atom must donate one unpaired electron. Carbon makes four bonds because i...

When a pluton (essentially a large pocket of magma) intrudes into rock, the heat from the pluton 'bakes' the surrounding rock- remember that heating a rock to high temperatures will initiate contact metam...

The atomic radii of an atom is essentially the distance from the centre of the nucleus to the outer shell of electrons- so atoms that are very small and have a small distance from the nucleus to the outer...

Quantitative Easing is the introduction of new money into the money supply and is performed by the central bank. There are several effects associated with quantitative easing, one such positive impact is ...

In order to solve a quadratic equation by factorisation you must first find the two numbers which add up to - 8 and multiply to get 15. We can do this by trial and error - first listing all of the pairs o...