Question

Ionisation potential of the element increases accross a period.​

Answer 1

• The ionisation potential of the element increases across a period. Atomic size decreases and nuclear charges increases as we move from left to right in a period so the energy required to remove one electron from the valence shell increases from left to right thus ionisation potential increases.

Answer 2

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Atomic size decreases and nuclear charge increases, this makes removal of electron difficult. Hence, more energy is required to remove electron, thereby increasing electron potential.