Electron Affinity

[Sana_Mian_3G]

What are the trends in the periodic table related to electron affinity? Also, is there any way to memorize it?

[Katie_Duong_1D]

Electron affinity has a less periodic trend (i.e. no rule for increasing across period/going down a group). Generally, high electron affinity elements are in the top right of the periodic table.

[cristinapadilla_1E]

In terms of electron affinity, there are patterns that you must recognize and memorize. As you go across a period, electron affinity increases. As you go down a group, electron affinity decreases.

[Aaron Ang 4H]

Also, another trend for electron affinity can be seen when you go diagonally from the bottom left to the top right of the periodic table. Chlorine has the greatest electron affinity.

[MaiaRodriguezChoi3E]

I think that looking at it diagonally from the bottom left to top right is probably the easiest way to look at the trend for electron affinity

[Athena L 1B]

It's also basically the same trend as electronegativity.

[Cade Okohira 4K]

The textbook asks this question but I don't understand how to answer it.

How do you account for the large decrease in electron affinity between, for example, lithium and beryllium?

[Chloe Qiao 4C]

I believe in the case of lithium and beryllium, lithium has only one electron in its 2s orbital but beryllium has two, which means the 2s orbital of beryllium is already full. Therefore, beryllium is like the noble gases in some way, when you add additional electron to its already full shell, it requires energy rather than release it.

[Megan_Ervin_1F]

What exactly is electron affinity and WHY does it increase towards the upper right diagonally?