| (i) 1st ionization energy \[=410\text{ }kJ\text{ }mo{{l}^{-1}}\] |
| (ii) 2nd ionization energy\[=820\text{ }kJ\text{ }mo{{l}^{-1}}\] |
| (iii) 3rd ionization energy\[=1100\text{ }kJ\text{ }mo{{l}^{-1}}\] |
| (iv) 4th ionization energy\[=1500\text{ }kJ\text{ }mo{{l}^{-1}}\] |
| (v) 5th ionization energy\[=3200\text{ }kJ\text{ }mo{{l}^{-1}}\] |
A) 4
B) 3
C) 5
D) 2
E) 1
Correct Answer: A
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\[X\].
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