Which halogen has the lowest electron affinity?

http://en.wikipedia.org/wiki/Template:Periodic_table_%28electron_affinities%29

Astatine?

I think so although no number is placed on it in that table you looked at. Most might say iodine since there is so little At around.

The halogens are a group of elements in the periodic table consisting of fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). To determine which halogen has the lowest electron affinity, we need to compare the electron affinities of these elements.

Electron affinity refers to the energy change when an atom gains an electron to form a negative ion. It is an indication of an atom's tendency to accept an electron. Higher electron affinity values indicate a greater tendency to accept an electron.

To find the electron affinity values for the halogens, you can refer to a reliable source such as a chemistry textbook or an online database. These sources provide a list of electron affinities for various elements.

From the available electron affinity data, you can compare the values for fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The halogen with the lowest electron affinity value will be the one that has the least tendency to accept an electron.

Keep in mind that electron affinity can vary depending on factors such as atomic size and electronic configuration. Therefore, the values need to be considered to make an accurate comparison.