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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
MCQ
The factors that influence the ionisation energies are :
  • A
    The size of the atom
  • B
    The charge on the nucleus
  • C
    How effectively the inner electron shell screen the nuclear charge.
  • ✓
    All of the above
✓

Answer

Correct option: D.
All of the above
Factors affecting ionisation potential :
Atomic size : Larger the atomic size, smaller is the ionisation potential. It is due to that the size of atom increases the outermost electrons e farther away from the nucleus and nucleus loses the attraction on that electrons and hence can be easily removed.
Effective nuclear charge $\ce{(Z_{eff​})}$ : Ionisation potential increases with the increase in nuclear charge between outermost electrons and nucleus.
Screening effect : Higher is the screening effect on the outer most electrons causes less attraction from the nucleus and can be easily removed, which is leading to the lower value of ionisation potential. Penetration power of sub shells and Stability of half filled and fully filled orbitals.

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