Successive ionization energy values incr...

Successive ionization energy values increase Why ?

Text Solution

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(i) Second ionization potential is always higher than first ionization potential
(ii) Removal of one electron from the valence orbit of a neutral gaseous atom is easy so first ionization energy is less . But from a unipositive Ion , removal of one more electron becomes difficult due to the more forces of attraction between the excess of protons and less number of electrons .
(iii) Due to greater nuclear attraction second ionization energy is higher than first ionization energy.

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A certain third period element has the following successive values of ionization energies in K . J . mol^(-1) {:(IE_(1),IE_(2),IE_(3),IE_(4),IE_(5)),(786,580,3230,4360,16100):} the element is

Carbon

Nitrogen

Aluminium

Silicon

Assertion : Ionization energy increase does the group. Reason : Atomic size increases down the group.

Both Assertion and Reason are ture and Reason is correct explanation of Assertion.

Both Assertion and Reason are true but Reason is ot the correct explanation of Assertion.

Assertion is true but Reason is false.

Assertion is false but reason is true.

Various successive ionization enthalpies (in kJ mol^(-1) ) of an element are given below: The element is

phosphorus

sodium

aluminium

silicon