What are the properties of noble gasses?

Answer 1

Noble gases have a minimum tendency to lose or gain electrons and thus engage in chemical reactions. Elements are more likely to combine when it leads to the outermost electron shell becoming full. For the noble gases the outermost electron shell has eight electrons, which is to say that it is already full (this is true for all except helium, which has 2 electrons in its only shell, but again this means the outermost shell is full). Therefore it is difficult for the atoms of a noble gas to combine with other atoms to form a compound. For this reason we say that the element is "inert" (as in does not react), and indeed the noble gases were known as the inert gases before it was discovered that it is possible for the heavier "inert gases" to form compounds.