Which of the elements Na, Mg, Si and P h...

Which of the elements Na, Mg, Si and P have the greatest difference between first and second ionization enthalpies? Briefly explain your answer.

Text Solution

Verified by Experts

Among Na, Mg ,Si and P , Na is an alkali metal. It has only one electron in the valence shell therefore its `Delta_(i)H_(2)` is very low . However after removal of the one electron . It acquires neon gas configuration i.e., `Na^(+) (1s^(2) 2s^(2) 2p^(6))` . Therefore its `Delta_(i) H_(2)` is expected to be very high. Consequently the difference in first and second ionization enthalpies would be greater in case of Na.
However it may be noted here that in case of Mg ,Si and P although their `Delta_(i) H_(1)` will be much higher than that of a but their `Delta_(i) H_(2)` will be much lower than that of Na . As a result the difference in their respective `Delta_(i) H_(1)` and `Delta_(i) H_(2)` would be much lower than that of Na.

Topper's Solved these Questions

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
PRADEEP|Exercise Analytical Question and Problems ( PROBLEMS )|5 Videos
CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
PRADEEP|Exercise Competition Focus (Jee Main and Advanced / Medical Entrance ) ( Multiple Choice Question I )|92 Videos
CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
PRADEEP|Exercise Additional Question (Long Answer Question )|4 Videos
CHEMICAL BONDING AND MOLECULAR STRUCTURE
PRADEEP|Exercise Curiosity Questions|2 Videos
ENVIRONMENTAL CHEMISTRY
PRADEEP|Exercise COMPETITION FOCUS (JEE(Main and Advanced)/Medical Entrance (VI.ASSERTION-REASON) Type II|6 Videos

The element having greatest difference between its first and second ionization energies, is

`Ca`

`Sc`

`Ba`

`K`

The element having greatest difference between its first and second ionization energies, is:

The lectronic configuration of the atom having maximum difference in first and second ionzation enthalpies is

`1s^(2)2s^(2)2p^(6)3s^(1)`

`1s^(2)2s^(2)2p^(3)`

`1s^(2)2s^(2)2p^(1)`

`1s^(2)2s^(2)2p^(6)3s^(2)3p^(1)`