Why does phosphorus have a negative electron affinity?
Phosphorus will have a less negative Eeas because P has an electronic configuration in which the 3p orbital is half filled, a very favorable configuration. Adding an electron will disrupt this half filled configuration. The elements on either side of P, Si and S , do not have this electronic configuration.
Why is first electron affinity negative and second electron affinity positive?
The first electron affinity value is virtually always negative for atoms. That means that there is a favorable change in energy associated with the addition of an electron. The second value is virtually always positive, because at that point you have to consider the electron repulsion occurring.
Why does phosphorus have a less negative electron affinity than its neighbors silicon and sulfur?
We’re talking about the energy being released when an electron is added so it’s draw in the added electron. So in phosphorus, if we add in an electron, we can see that phosphorous will no longer have 1/2 felled orbital. So since the reaction is unfavorable, electron affinity is less negative.
Why does phosphorus have a positive electron affinity?
[B] The larger size of an atom of phosphorus results in less electron repulsion when the first and second electrons are added, compared with the smaller atom of nitrogen. [C] The added electrons are placed closer to the nucleus in an atom of phosphorus, and so they experience strong attraction from the nucleus.
What is electron affinity of phosphorus?
Electron Affinity of Phosphorus is 72 kJ/mol.
What is the electron affinity of phosphorus?
Electron affinity can be defined in two equivalent ways. First, as the energy that is released by adding an electron to an isolated gaseous atom….Elements.
| Z | 15 |
|---|---|
| Element | P |
| Name | Phosphorus |
| Electron affinity (eV) | 0.746 609(11) |
| Electron affinity (kJ/mol) | 72.037(1) |
Why phosphorus has lower electron affinity than silicon?
Re: Electron Affinity Relationship of C and N. This is because of the p orbitals of these elements. For example, phosphorous has its 3P orbital half-filled which is fairly stable so when one more electron is accepted the stability is disturbed. This is why the electron affinity of phosphorous is less than silicon.
Why is electron affinity of phosphorus positive?
(B) The larger size of an atom of phosphorus results in less electron repulsion when the first and second electrons are added, compared with the smaller atom of nitrogen. When the electron affinity is positive, energy is released.