What is the electron affinity trend for halogen?

Since the atomic size increases down the group, electron affinity generally decreases (At < I < Br < F < Cl). An electron will not be as attracted to the nucleus, resulting in a low electron affinity. However, fluorine has a lower electron affinity than chlorine.

What is the trend in electron affinity down group 7?

As the atom gets bigger, the incoming electron is further from the nucleus and so feels less attraction. The electron affinity therefore falls as you go down the Group.

What is electron affinity and what are its periodic trends?

The electron affinity of an atom or molecule is the propensity for that particle to gain an electron. Electron affinity generally increases across a period in the periodic table and sometimes decreases down a group. These trends are not necessarily universal.

Why are the electron affinity of halogens so high?

The high electron affinities of the halogens are a result of their having an almost complete outer shell of electrons. Because of this overall attraction, energy will be released when the electron is captured by the fluorine atom. Similar reasoning also explains why oxygen also has a high electron affinity.

Do halogens have high or low electron affinity?

Halogens have a high electron affinity.

What are group 7 halogens?

The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table . Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals.

What are the trends down group 7?

In group 7, the further down the group an element is, the higher its melting point and boiling point . This is because, going down group 7: the molecules become larger. more energy is needed to overcome these forces.

What are electron affinity values?

From Wikipedia, the free encyclopedia. The electron affinity (Eea) of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion.

Which element has highest electron affinity among halogens?

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.

Which halogen has the highest value of electron gain affinity?

Chlorine
Chlorine has the highest electron gain enthalpy among the halogens.

Do halogens have a large or small electron affinity?

What is the halogen with the lowest electron affinity?

Astatine
Astatine has the lowest ionization energy, electron affinity, and electronegativity of all the halogens.

What are the electron affinity values of three halogens?

The electron affinity values (kJmol−1)of three halogens X, Y, and Z respectively are −349, −333, and −325. Then X, Y, and Z respectively are : Medium

What is electelectron affinity?

Electron Affinity is the energy associated with the addition of an electon to a gaseous atom. Notice the sign on the energy is negative. This is because energy is usually released in this process, as opposed to ionization energy, which requires energy. A more negative electron affinity corresponds to a greater attraction for an electron.

What is electron affinity and how is It measured?

Electron affinities are difficult to measure. Electron affinity increases going left to right across a period. The overall trend across a period occurs because of increased nuclear attraction. Going down the group the electron affinity should decrease since the electron is being added increasingly further away from the atom.

What is the trend in electron affinity down a group?

As with ionization energy, there are two rules that govern the periodic trends of electron affinities: Electron affinity becomes less negative down a group. As the principal quantum number increases, the size of the orbital increases and the affinity for the electron is less. The change is small and there are many exceptions.