Question

What is meant by ionization energy?

Answer 1

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➡Ionization energy :

✨Ionization energy is the energy required to remove an electron from outer most orbit or shell of a neutral gaseous atom or ion.

✨The first ionisation energy is the energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

In a periodic table,

Ionization energy DECREASES as we go down a group. Ionization energy INCREASES from left to right across the periodic table.

This SI unit of ionization energy is kJ/mol or kcal/mol.

HELIUM has the largest ionization energy.

FRANCIUM has one of the lowest ionization energy.

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Answer 2

So, let us start with the basic definition:-

Q1. What is ionization energy?

answer➡️It is the minimum amount of energy which is required to remove a loosely bound electron from an electronic shell of a neutral and gaseous atom.

●Down the group ionization energy decreases and across a period it generally increases from left to right.

●Caesium has the lowest ionization energy whereas leaving the exception of helium, Fluorine has the highest ionization energy.