Pages

Monday, June 20, 2011

Electron Affinity

Electron affinity may be defined as, The amount of energy released when an isolated gaseous atom accepts an electron to form monovalent gaseous anion.”
The process can be expressed as;
X (g)     +       e  −−−−−−>   X (g)   +   Energy (E. A.)
The value of Electron Affinity (E.A) measures the tendency of an atom to accept an electron.
SUCCESSIVE ELECTRON AFFINITIES
When the first electron is added to the gaseous atom, it forms a Uninegative ion and the energy released is called First Electron Affinity (E.A1).Now if an electron is added to the uninegative ion, it experiences a repulsive force from an anion. As a result, the energy has to be supplied to overcome the repulsive force. Thus, in order to add the second electron energy is required rather than released. Therefore, the value of second Electron affinity is negative. Similarly, addition of 3rd, 4th electrons etc. also requires energy. Thus, the values of successive electron affinities (EA2, EA3 ……) are negative.

7 comments:

  1. Can u explain aome more detailed

    ReplyDelete
  2. it is not that clear....anyways it is ok

    ReplyDelete
  3. thanks for help this sooo good for chemistry student

    ReplyDelete
  4. Professionally written blogs are rare to find, however I appreciate all the points mentioned here. I also want to include some other writing skills which everyone must aware of.hulp bij belastingaangifte amsterdam

    ReplyDelete
  5. Detailed and descriptive articles written in this blog is really very helpful for me as well as for other who seeking such kind of knowledge. It is definitely going to become useful in coming future.hulp bij belastingaangifte amsterdam

    ReplyDelete

  6. Yes, nice topic, the blog is fully detailed and helpful and have good insights you have share over here.. infact i write about number of topics like NRI Lawyer in India let share some views about our content...

    ReplyDelete