Short Answer Type
Long Answer TypeWhat are successive ionisation enthalpies? Explain why the second ionisation enthalpy is higher than the first ionisation enthalpy?
Short Answer TypeWhat are the various factors due to which the ionization enthalpy of the main group elements tends to decrease down a group?
Why does the first ionsiation enthalpy increase as we go from left to right through a period of the periodic table?
Or
How does ionisation enthalpy vary along a period?
Why is ionisation enthalpy of Be more than that of B?
The electronic configuration of Be (Z = 4) and B(Z = 5) are,
(i) The electronic configuration of Be in which all the occupied orbitals are fully filled is more stable than boron.
(ii) It is relatively easier to remove electron from 2p subshell in boron than removal of electrons from 2s subshell in Be as 2p orbital is less penetrating than 2s orbital. Therefore, 2p electron of B is less firmly held by the nucleus and so, it is relatively easily removed.
Why ionsiation enthalpy of N is more than that of O even though oxygen has higher nuclear charge than nitrogen?
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