Trends in Electron Affinity
Trends in electron affinity refers to the change in value of electron affinity as we move across the periodic table. The electron affinity depends upon the nuclear charge and atomic size. Electron affinity is directly proportional to the nuclear charge on the atom and inversely proportional to its atomic size. Hence we can conclude:
- Electron affinity increases across the periodic table from left to right due to nuclear charge increases.
- Electron affinity generally decreases down a group of elements because each atom is larger than the atom above it.
Electron Affinity Table
The trend of electron affinity can be summarized by image of periodic table added below,
Electron Affinity
Electron Affinity is a measure of the attraction between an incoming electron and the nucleus of an atom or molecule. It is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom.
In this article, we will look into what electron affinity is, its periodic trends, the factors affecting electron affinity, and the values of electron affinity of different elements.
Table of Content
- What is Electron Affinity?
- Trends in Electron Affinity
- Types of Electron Affinity
- Factors Affecting Electron Affinity
- Electron Affinity Vs Ionization Energy
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