What is the electron affinity of oxygen?
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 | 8 |
|---|---|
| Element | 17O |
| Name | Oxygen |
| Electron affinity (eV) | 1.461 108 (4) |
| Electron affinity (kJ/mol) | 140.975 5(3) |
Why oxygen have more electron affinity than carbon?
Carbon has a higher electron affinity than Oxygen because it is easier to place an electron in the ground state C atom than a ground state O atom.
Who has more electron affinity carbon or oxygen?
Oxygen has a higher electron affinity than carbon. Electron Affinity increases left to right in a Period. In Period-2, element Carbon has an electron affinity of -1.25 e V and element Oxygen has an electron affinity of -1.48 e V.
Which has more electron affinity O or O?
If electron affinity is favorable, energy is released upon adding an electron, meaning it’s negatively-signed. However, since EA2 is positive, it means it requires energy to add that electron to O− ! Therefore, the “greater” electron affinity (really, the more favorable electron affinity) is with O .
What is the first electron affinity of oxygen?
-142 kJ mol-1
Why is energy needed to do this?
| O(g) + e- O-(g) | 1st EA = -142 kJ mol-1 |
|---|---|
| O-(g) + e- O2-(g) | 2nd EA = +844 kJ mol-1 |
What is the second electron affinity of oxygen?
The required second electron affinity of oxygen is $744.4kJ/mol$. So the correct option is D. Additional Information:-Electron affinity is defined as the minimum amount of energy released when an electron is added to its neutral atom or molecule in its gaseous state to form a negative ion.
Why does C have a more exothermic electron affinity than N group of answer choices?
Electron affinity decreases or increases across a period depending on electronic configuration. 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.
Which is more negative oxygen or carbon?
As a result, there is slightly more negative charge around the oxygen atom that around the carbon atom. The covalent bond between a carbon and an oxygen atom is therefore polarized.
Which electron has highest affinity?
Halogens has higher electron affinity and it is supposed to be for fluorine, but chlorine has higher electron affinity than fluorine due to fluorine’s smaller size. Hence, among given options chlorine has highest electron affinity.
Does oxygen have a high electron affinity?
The positive sign shows that you have to put in energy to perform this change. The second electron affinity of oxygen is particularly high because the electron is being forced into a small, very electron-dense space.
Which has more electron affinity C or N?
Since a half-filled “p” subshell is more stable, carbon has a greater affinity for an electron than nitrogen.
Why does chlorine have the highest electron affinity?
Chlorine has the highest electron affinity among the elements. Its high affinity can be attributed to its large atomic radius, or size. Because chlorine’s outermost orbital is 3p, its electrons have a large amount of space to share with an incoming electron.
Electron affinity of Oxygen is 141 kJ/mol. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion.
What is electron affinity and electronegativity?
Electron affinity is related to electronegativity of elements. Simply speaking, the greater the affinity of electrons, the more eagerly the atoms of a given element join electrons to form ions (anions). The electronic affinity is most often given in electron volts (eV) or in kilojoules per mole (kJ / mol).
What is the electron affinity of argon?
It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure.
What is the electron affinity of nitrogen and boron?
The negative ions of boron and nitrogen are found to be unstable, the electron affinity being ca – 0.14 and – 0.72 ev, respectively. The electron affinities of carbon and oxygen atoms are 1.75 and 1.13 ev, respectively.