We’re being asked to determine the element with the most negative electron affinity (i.e. high electron affinity).
Recall that electron affinity is the energy change from the addition of 1 e– to a gaseous element/ion.
It is represented by this chemical equation:
Atom(g) + e– → Ion–(g), ΔE = –E.A.
The trend for electron affinity is as follows: it increases from left to right and decreases down a period in the periodic table. The given elements are:
Choose the element with the more negative (more exothermic) electron affinity from each of the following pairs.
C or N
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Electron Affinity concept. You can view video lessons to learn Periodic Trend: Electron Affinity. Or if you need more Periodic Trend: Electron Affinity practice, you can also practice Periodic Trend: Electron Affinity practice problems.