ionization energy

[Ruiting Jia 4D]

Why is the 2nd ionization energy of an element always higher?

[Sara Flynn 2C]

The pull from the nucleus increases for each individual electron because it has less electrons to pull when it has a charge of plus one and so the electrons that remain are more difficult to remove and require more energy to remove than the first electron

[Erica Li 1C]

Removing the first electron is easier since the pull isn't as strong but the second one is always harder since there is a pull on the electrons that are left so it's harder for them to be removed

[Krisdylle Repollo 4H]

This is because the more electrons you take away from an atom, the stronger the attraction between the nucleus and the remaining electrons are. The atom then becomes positive which leads to a greater energy needed to remove the next electron from the atom.

[Elaine Pham 2E]

The 2nd ionization energy is always higher than the first ionization energy because when removing the second electron, you are removing it from the cation of the element. It takes more energy to remove an electron from a cation than a neutral atom because the cation is holding onto the electrons more tightly due to the attraction of the positive nucleus.

[Jake Gordon 1A]

The second ionization energy occurs after one electron has been removed. Assuming the element is neutral at first, taking away an electron will make a cation and leave the same number of positive protons with one less negative electron. Electrostatic attraction increases the pull of the electrons to the nucleus making it require more energy to rip away a second electron creating a potential +2 cation.

[ran2000]

Because the second ionization energy is the removal of the electron from a cation which has a stronger pull on the electron than the neutral atom.

[MaggieMatern_Dis1H]

The outermost electron occupies the highest energy level, and is the furthest from the nucleus and therefore experiences the weakest attraction from the nucleus.
Therefore, it takes the least amount of energy to remove this electron.
An atom that has lost an electron is now a cation and now the amount of positive charge from the nucleus exceeds the negative charge of the electrons, so the attractive force is very strong.
That would make it very hard (i.e. require a high amount of energy) to remove an electron.