Why are the electron affinities of noble gases highly positive? The outer electrons of noble gases experience a low $Z_{eff}$. Noble gases are elements in the gas phases. Noble gases have an empty octet. Noble gases have a full octet.
Added by Derek N.
Close
Step 1
A highly positive electron affinity means that adding an electron is energetically unfavorable. Show more…
Show all steps
Your feedback will help us improve your experience
Ryan Carlson and 66 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Why do noble gases have negative electron affinity values?
The electron affinities of the group 17 elements are all negative values, but the EA values of the group 18 noble gases are all positive. Explain this difference.
Elements with very large first ionization energies also tend to have highly exothermic electron affinities (EA). Electron affinity is a measure of the energy change when an electron is added to a neutral gaseous atom. Why would atoms with very positive ionization energies have very negative (exothermic) electron affinities? Explain your thinking. Which group (family) of elements would you expect to be an exception to this statement? Explain your thinking.
Sri K.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD