Question

Apply Why Are All Of The Elements In Group 18 Relatively Unreactive, Whereas Those In Group 17 Are Very Reactive?

Answer 1

Element of group 18 have 8 electrons in their valence shell, ie. their valence shell is completely filled and they have a stable configuration. They are extreamly stable elements. On the other hand, Elements of group 17 have 7 electrons in their valence shell, ie. they need only 1 electron to attain stable configuration. So, they react easily to gain 1 electron and become stable.

Answer 2

In the 18 th group elements there is absence of empty orbitals
they all are having fulfil orbitals leads to their stability so that they unreactive...

nd in 17th gr elements there is empty d orbital and also they possess high electronegativity so that they are very reactive....