E- removal

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005095564
Posts: 30
Joined: Wed Sep 18, 2019 12:18 am

E- removal

Postby 005095564 » Wed Oct 23, 2019 3:44 pm

Why is it harder to remove a second electron from an element?

AVerma_F19
Posts: 59
Joined: Thu Jul 25, 2019 12:15 am
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Re: E- removal

Postby AVerma_F19 » Wed Oct 23, 2019 3:47 pm

The first and second electron have an energetic relationship, meaning that there is some e-/e- repulsion between the 2. When the first is removed, that repulsive force disappears, leaving the second electron more tightly bound to the nucleus. Additionally, since the nucleus has less electrons to hold on to, the effective nuclear charge on each electron increases with the removal of the first.

Alexis Webb 2B
Posts: 124
Joined: Thu Jul 11, 2019 12:15 am

Re: E- removal

Postby Alexis Webb 2B » Wed Oct 23, 2019 3:49 pm

Its harder to remove because it is getting closer to the nucleus, and also the pull of the positive charge of the nucleus becomes stronger, so the electron is harder to remove.

Hannah Romano 4D
Posts: 55
Joined: Sat Aug 24, 2019 12:18 am

Re: E- removal

Postby Hannah Romano 4D » Wed Oct 23, 2019 3:50 pm

One reason for this is that once you remove the first electron from at atom, it is now a positively charged ion. Because of this greater positive charge in the nucleus, the electrons will be more attracted to the nucleus and therefore more difficult to remove. Additionally, subsequent electrons may be in lower energy shells and therefore closer to the nucleus. Electrons closer to the nucleus are shielded less and by other electrons because there are less electrons between the outer electron and the nucleus. the electron will again experience a greater positive attraction and be more difficult to remove.


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