Ionization Energy

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Celine 1F
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Joined: Fri Aug 02, 2019 12:16 am

Ionization Energy

Postby Celine 1F » Mon Oct 21, 2019 12:32 pm

Why is it harder to remove the second electron than the first electron from the same element?

Indy Bui 1l
Posts: 99
Joined: Sat Sep 07, 2019 12:19 am

Re: Ionization Energy

Postby Indy Bui 1l » Mon Oct 21, 2019 12:34 pm

The second ionization energy is higher for all elements

Ariel Davydov 1C
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Re: Ionization Energy

Postby Ariel Davydov 1C » Mon Oct 21, 2019 12:36 pm

When losing an electron, the nucleus's pull on the electrons grows stronger, as with less negative energy the positive charge of the nucleus has a stronger pull on the electrons surrounding it, thus decreasing the size of the atomic radius. Because of this, it will require a greater amount of energy to remove a second electron due to the nucleus's stronger pull on the electrons.

Indy Bui 1l
Posts: 99
Joined: Sat Sep 07, 2019 12:19 am

Re: Ionization Energy

Postby Indy Bui 1l » Mon Oct 21, 2019 12:36 pm

Second ionization energy is higher, because with one less electron there is greater pull from the nucleus on the remaining electron, and less electron-electron repulsion. This greater pull makes it much harder to remove the second electron.

Brian_Ho_2B
Posts: 221
Joined: Fri Aug 09, 2019 12:16 am

Re: Ionization Energy

Postby Brian_Ho_2B » Mon Oct 21, 2019 1:30 pm

To add on to what the others have said, it also has to do with stability in terms of whether the orbitals or subshells are full or not. For instance the reason that the second ionization energy for Na is so high is because it would have to remove an electron from its inner core, which would be its neon core. The core is already stable, and removing an electron would serve little purpose to maintain stability. However, the first ionization energy for Na is very low because the one electron to be removed is the only electron in the shell, subshell, and orbital, and it is far from the nuclear attraction. That is another fine example of how the second ionization energy level is higher than the first.


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