Chapter 11, Problem 6RQ

Interpretation Introduction

Interpretation:

The first ionization energy of Helium atom is much higher than Hydrogen atom this has to be explained.

Concept Introduction:

Atomic radii:

  The atomic radius of an atom can be defined as the distance between the center of the nucleusand the outermost electron. In the periodic table, across a period atomic radius is decreases and increases down a group.

Ionization energy:

The amount of energy required to remove an electron from the atom is known ionization energy.  If the removed electron is first then it will be first ionization energy, if the removed electron is second then it will be second ionization energy.

For example,

  $\text{Na}\text{+}\text{Ionization}\text{energy}\stackrel{}{\to }{\text{Na}}^{\text{+}}\text{+}\text{e}$