Electron Affinity and Noble Gases

These flashcards cover the concept of electron affinity, focusing on the unique behavior of noble gases.

Electron Affinity

The amount of energy released or absorbed when an electron is added to a neutral atom.

Endothermic Process

A process that absorbs heat from the surroundings.

Noble Gases

Group 18 elements in the periodic table, known for their lack of reactivity due to a full valence shell.

Why are electron affinity values for noble gases endothermic?

Because noble gases have a complete valence shell, adding an electron would require energy to overcome the repulsion between the negatively charged electron and the already present valence electrons.