00:01
Okay, so in this question, you asked you to look at the, ask you to estimate the average separation between the electrons in the helium atom.
00:10
So a helium atom has a nuclear, which consists of two protons.
00:16
So it has charged two e, right? and you have two electrons orbiting about the nuclear, okay? so you have two electrons, one is e, the other is the other e.
00:31
In the ground state, and assume that these two electrons were in the same orbit, the ground state of the helm -arton.
00:40
Now, you know, if those two electrons were independent from each other, they, you know, each electron will have energy, which is minus 3, 13 .60 electron volts and times, z, which is the atomic number, in this case, is two, right? so you will get minus 27 .2 electron roads.
01:06
And this will be the analysis energy, right? if you assume these two electrons were independent, each electron will be having energy minus 27 .2 electron roads.
01:19
And if you want to analyze this halal atom, you want to knock away one of electrons, you need to supply at least 27 .2 electron roads.
01:29
Okay, you will assume these two electrons are independent, but actually they were not independent.
01:34
And because experimentally was found that the actual ionization energy is less than 27 .2 electron volts.
01:43
What's observed is actually, according to the question, it's 24 .6 electron volts.
01:51
That's the actual ionization energy, okay, ei, ionization energy.
01:57
The actual agonization energy is 24 .6 electrodes.
02:00
So there's a difference between the calculate electron analysis energy, if this electron was resumed independent, with the actual analysis energy.
02:12
And the difference is 27 .2 minus 24 .6 electron volts.
02:20
And that is just 2 .6 electron volts.
02:25
So why would it take actually less, 2 .6 electron votes less...