The element that typically has an oxidation state of -1 is halogen.

Here's why:

* Halogens are in Group 17 of the periodic table.

* They have seven valence electrons (electrons in their outermost shell).

* To achieve a stable octet (eight electrons in their outermost shell), they tend to gain one electron.

* Gaining an electron results in a -1 charge, thus their oxidation state is -1.

Examples of halogens include:

* Fluorine (F)

* Chlorine (Cl)

* Bromine (Br)

* Iodine (I)

Note: While halogens commonly have a -1 oxidation state, they can have other oxidation states in certain compounds.