2012年6月10日星期日

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Diamonds are the hardest naturally occurring substance that? has been discovered, they rank a 10 on the moh scale of hardness and are generally considered indestructible.? There is designer sunglasses for women only gucci sunglasses on sale one element found in [pure] diamonds, carbon.?
They are formed in the earth's mantle under extremely high temperatures and pressure over billions of years.? Carbon (from the earth's core, sometimes from decayed organic compounds) is 'pressed' together and heated which leads to a form of bonding known as covalent bonding. Covalent bonding is different to Ionic bonding in that the atoms 'share' the electrons in their outer shells in order to become more stable.? In the case of diamonds, the individual carbon atoms bond to four other carbon atoms (the most amount of covalent bonds carbon can have is four), and so covalent bonds between four atoms are formed.? These bonds together then form a lattice, which is simply a structure of covalent bonds, and in the case of a diamond it is quite simply called a diamond latice.? A diamond lattice is a particularly rigid lattice and is made up of millions boss sunglasses and millions of individual atoms all bonded together.?

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