Question

Ionization potential increases across a period, from left to right?

Answer 1

Definition for Ionization potential

Ionization potential is the energy required to remove an electron completely from an isolated gaseous atom.

• Ionization potential increases with decrease in atomic size and increase in nuclear charge.
• From left to right in the periodic table, atomic size decreases and effective nuclear charge increases.
• There is a strong force of attraction between the valence electron and the nucleus.
• So greater energy is required to remove an electron from its valence shell.
• Therefore, ionization potential increases.

Conclusion

Ionization potential increases from left to right in a period due to decrease in size and increase in effective nuclear charge of an isolated gaseous atom