Why does C have a more exothermic electron affinity than N?
Why does C have a more exothermic electron affinity than N?
This occurs because of the same subshell rule that governs ionization energies. Since a half-filled “p” subshell is more stable, carbon has a greater affinity for an electron than nitrogen.
What are the units of electron affinity?
Electron affinity is the amount of energy required to detach one electron from a negatively charged ion of an atom or molecule. It is indicated using the symbol Ea and is usually expressed in units of kJ/mol.
What does positive electron affinity mean?
The electron affinity is the energy change when an atom gains electrons. The convention is that the higher or more positive the electron affinity value, the more readily the atom accepts an electron.
Why chlorine has highest electron gain enthalpy?
But, chlorine is large in size and has comparatively low value of electronegativity than fluorine. Thus, it accepts an electron easily and has the highest electron gain enthalpy value.
Why second electron gain enthalpy of oxygen is positive?
When an electron is added to an isolated oxygen atom, it becomes uninegative ion. Now if one more electron has to be added, then it will experience a repulsive force or columbic force of repulsion. Therefore , the second electron gain enthalpy is positive for oxygen.
Why second electron gain enthalpy is endothermic?
Why is the second electron gain enthalpy negative (i.e. energy is absorbed)? Solution : Second is to be added to negatively charged ions which will repel the incoming electron. The energy required to overcome repulsion is more than energy released on adding electron.
Why the value of second electron affinity is positive whereas first electron affinity is always negative?
Answer. When an neutral atom takes electron it gives out energy so first electron affinity is negative. But when we try to add an electron in a uni negative ion it repels the coming electron due to more no of electrons than protons, thus second electron affinity is always negative.
Why electron gain enthalpy of Mg and P are almost zero?
As you can see Magnesium have fully filled subshell and Phosphorus have half filled. Fully filled and half filled shells are so much stable that it leads high amount of energy to make electron enter. That’s why EGE is almost 0.
Why electron gain enthalpy of noble gases is positive?
As they have stable configuration still if it gains electron then it required a lot of energy to add that electron then its configuration becomes similar to group 1 which are very reactive. hence due to high energy requirement, it has positive electron gain enthalpy.
What is the electron gain enthalpy of carbon?
First, as the energy that is released by adding an electron to an isolated gaseous atom….Elements.
| Z | 6 |
|---|---|
| Element | 12C |
| Name | Carbon |
| Electron affinity (eV) | 1.262 122 6(11) |
| Electron affinity (kJ/mol) | 121.776 3(1) |
Which metalloid has maximum electron affinity?
Atoms whose anions are more stable than neutral atoms have a greater Eea….Electron affinities of the elements.
| hide v t e Electron affinities in the periodic table | 13 | Al42 |
|---|---|---|
| 14 | Si134 | |
| 15 | P 72 | |
| 16 | S 200 | |
| 17 | Cl349 |
What is Nitrogens electron affinity?
Electron Affinity of Nitrogen is 7 kJ/mol. Electronegativity of Nitrogen is 3.04. An atom of Nitrogen in the gas phase, for example, gives off energy when it gains an electron to form an ion of Nitrogen.
Why does oxygen have a low electron affinity?
I’ve read that oxygen has a lower electron affinity (as shown the picture below), because it has a smaller atomic radius than sulfur and thus the electrons experience significant electron-electron repulsion.