Elements that form ions with a 1+ charge are those that tend to lose one electron to achieve a stable electron configuration. These elements are typically located in Group 1 (alkali metals) of the periodic table.

Here are some examples:

* Lithium (Li): Li+

* Sodium (Na): Na+

* Potassium (K): K+

* Rubidium (Rb): Rb+

* Cesium (Cs): Cs+

Note: While Hydrogen (H) is also located in Group 1, it can form both a 1+ ion (H+) and a 1- ion (H-).

Additionally, some elements in Group 11 (coinage metals) can also form 1+ ions, though they are less common. For example:

* Copper (Cu) can form both Cu+ and Cu2+ ions.

* Silver (Ag) typically forms Ag+ ions.

* Gold (Au) can form both Au+ and Au3+ ions.