Why the first ionization energy of neon higher than magnesium?
1) Neon is a noble gas and as a result it has a noble gas electronic configuration. It is difficult to break that electronic configuration because it is very stable. But Magnesium has got only a half stable configuration. Though its 3s electrons are present the 3p is empty. But in Neon the whole 2nd shell is filled with electrons which makes it very stable. So removing an electron from Neon is more difficult than Magnesium because Neon has a more stable electronic configuration. 2) In Aluminium apart from the 3s electrons there is a 3p electron present. But Magnesium has got a filled 3s and an empty 3p which makes it stable. But if one electron is removed from Aluminium the 3p electron is removed and it takes on Magnesium electronic configuration which makes it more stable than the configuration it had before. 3) Neon has the lowest melting point. Mainly because it has van der waals forces between molecules. But all the other three elements are metals and they have metallic bonds betwe
