Question

Define ionization energy. Name the factors on which ionisation energy depends? How does it vary down the groups and across the period? ​

Answer 1

The size increases as we move from top to bottom in a group. As, the electrons get added up in the new shell, the electron in the outermost orbital gets far away from the nucleus. And hence, the electron will be easier to remove. Thus, the ionization energy decreases from top to bottom in a group

Answer 2

$\huge \underline \frak \purple{ionization \: energy}$

The size increases as we move from top to bottom in a group. As, the electrons get added up in the new shell, the electron in the outermost orbital gets far away from the nucleus. And hence, the electron will be easier to remove. Thus, the ionization energy decreases from top to bottom in a group.