The Element Formula 4 iPhone case has an amazing blend of functionality, protection and a sense of style. Just by taking a glance at the case it is easy to tell that it is more than the average iPhone ...

Iron makes up about 5 per cent of the Earth's crust and is the most abundant element in the whole Earth (about 35 per cent).

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The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table. And here ...