1. Tardigrade
  2. Question
  3. Chemistry
  4. The successive ionization energy values for an element 'X' are given below: (i) 1st ionisation energy = 410 kJ mol-1 (ii) 2nd ionisation energy = 410 kJ mol-1 (iii) 3rd ionisation energy = 1100 kJ mol-1 (iv) 4th ionisation energy = 1500 kJ mol-1 (v) 5th ionisation energy = 1500 kJ mol-1 Find out the number of valence electron for the atom 'X'

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Q. The successive ionization energy values for an element $ 'X' $ are given below :
(i) 1st ionisation energy = 410 kJ $ mol^{-1} $
(ii) 2nd ionisation energy = 410 kJ $ mol^{-1} $
(iii) 3rd ionisation energy = 1100 kJ $ mol^{-1} $
(iv) 4th ionisation energy = 1500 kJ $ mol^{-1} $
(v) 5th ionisation energy = 1500 kJ $ mol^{-1} $
Find out the number of valence electron for the atom $ 'X' $

KEAMKEAM 2006

Solution:

The ionization energy values for valence electrons are comparable to remove electrons from inner shell very high amount of energy is needed. In the given values there is a biggest jump between $ I{{E}_{4}} $ and $ I{{E}_{5}} $ . Hence, there are four valence electrons for the atom $ X $ .