Do noble gases have higher electron affinity than halogens?
Do noble gases have higher electron affinity than halogens?
Group VIIA elements, the halogens, have highest electron affinities because the addition of an electron to an atom results in a completely filled shell. Group VIII elements, noble gases, have electron affinities near zero, since each atom possesses a stable octet and will not accept an electron readily.
What is the electron affinity of noble gases?
Electron affinity of noble gas elements is zero.
Why do halogens have a negative electron affinity while noble gasses have positive electron affinity?
Why is the electron affinity of noble gases positive? The enthalpy of electron gain for halogens is highly negative because by accepting an extra electron they can acquire the nearest stable noble gas configuration. Noble gases have significant positive enthalpy in the gain of electrons.
Why is electron affinity highest for halogens?
The atomic size of halogens is very small. The smaller the atomic size , the greater the electron affinity , because the effective attractive force between the nucleus and the valence electrons is greater in smaller atoms , and so the electrons are held firmly.
Do noble gases have the highest electron affinity?
Any electrons added to a noble gas would have to be the first electron in a new (larger) energy level. This causes the noble gases to have essentially zero electron affinity….Nonmetals Tend to Have the Highest Electron Affinity.
| Element | Electron Configuration | Electron Affinity |
|---|---|---|
| Krypton (Kr) | [Ar]4s24p6 | 0 kJ/mol |
What is the electron affinity of halogens?
However, fluorine has a lower electron affinity than chlorine….Electron Affinity (decreases down the group)
| Halogen | Electron Affinity (kJ/mol) |
|---|---|
| Fluorine | -328.0 |
| Chlorine | -349.0 |
| Bromine | -324.6 |
| Iodine | -295.2 |
Do noble gases have highest electron affinity in a period?
Solution : All noble gases have stable configuration. Therefore, they can not take any electron means that they have no affinity for electrons. High electron affinity shows that electron is strongly bonded to the atom. Here both assertion and reason are false.
Why do noble gases have low electron affinity?
Because noble gases have a full octet, their ionization energies are actually quite high. Electron affinity is the amount of energy released when an electron is added to a neutral atom. Because noble gases have stable electron configurations, they have very low electron affinities.
Why do noble gases not follow electron affinity?
The noble gases, however, do not follow the general trend for electron affinities. Even though the noble gases are small atoms, their outer energy levels are completely filled with electrons and therefore, an added electron cannot enter their outer most energy level.
Which halogen has highest affinity?
chlorine
Therefore, chlorine has a higher electron affinity than fluorine, and this orbital structure causes it to have the highest electron affinity of all of the elements.
