Find the highest ratio of Ionisation values of given pair of elements:
→ (a) He : Ne
→ (b) Ne : Ar
→ (c) He : Xe
→ (d) Kr : Xe
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Hi!! ionisation values down a group decreases with successive elements as no. of shell increases and the size of the atom gets bigger weakening the force of attraction exerted by the nucleus on the outermost electrons. So u just need to look for the highest n lowest placed noble gases in the grp. Xe is lowest and He is highest placed so ionisation energy for He is max. n for Xe its min. so ur answer will b option c)
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