00:01
The amount of energy required to remove electron from the outer shell of an atom is the ionization energy.
00:08
In fact, it is the minimum amount of energy required to remove the electron.
00:13
Suppose if you consider an atom, the center part is neutrals, we have electrons in various shells.
00:18
Now, the last electron is loosely bound and its nuclear attractions are less.
00:25
So to remove these electrons, when the atom is in its isolated, gasseous form, the energy required is ionization energy.
00:34
So to remove the first electron, the energy is said to be ionization energy 1.
00:38
For the second electron, it's 2, for 3, and for the end the electron it is ien.
00:45
So, here of you, ionization energy values are given, where ie1 is given us 738 kilojoules, and ie 2 is given us 1451 kilojoules.
01:00
Here if you observe the compared to ie1, ie2 values are larger, in fact it is double the amount.
01:09
It's because when the atom is neutral, protons and electrons are equal, equal positive and equal negative charges with the present.
01:18
When you remove one electron, it becomes positively charged particle so that protons are dominating compared to electrons.
01:26
So the electrons now are strongly held by the nucleus.
01:29
So, removal of electron from a unipositive ion becomes even more difficult...