Write short notes on the following types of elements –

noble gases

Noble gases —

1. The elements of group 18 [0] from ⁹He [Helium] to ⁵³Rn [Radon] are called Noble gases.
2. They are non-metals and have eight valence elections in outer shell [except Helium (He) which has only two]. They have stable electronic configuration hence their valency or combining capacity is Zero.
3. Noble gases do not react with other elements & are therefore inert or unreactive. They are all monatomic gases.