Page 1 of 1

Electron Affinity

Posted: Sun Oct 28, 2018 4:34 pm
by Ariana Morales
What steps are needed to be taken in order to solve this question?

1.F.11 Which element of each of the following pairs has higher electron affinity: a) tellurium or iodine and b) beryllium or magnesium?

Re: Electron Affinity

Posted: Sun Oct 28, 2018 5:20 pm
by Sara Lakamsani 4D
You need to take into account the trends of electron affinity based on the periodic table. So, electron affinity decreases as you go down a group, because electrons are farther away from the nucleus and there is increased shielding because electrons are at higher energy levels. It increases as you go left to right across a period because these elements have more valence electrons and are closer to reaching an octet. Knowing this, you need to compare the positions of each pair to see which one would have a higher electron affinity. Hope this helps!