Since water is ubiquitous on our planet H+ and OH-
I^- is the most common ion of Iodine.
The most common fluorine ion is fluoride (F-) ion.
P3- is the most common ion of phosphor. Howver, when combined with other elements such as oxygen, the phosphate ion PO43- is the most common.
The most common ion for cesium is Cs+ (cesium ion). This ion has a charge of +1.
The most common Selenium ion is Se2- the selenide ion. It is in the same group as oxygen and its most common ion in the oxide ion O2-.
The most common charge for an iodine ion is -1.
The most common ion formed by sulfur is the sulfide ion (S2-).
-2 is the most common charge (sulphide ion).
The most common ion for sodium is Na+ (sodium ion), which has a positive charge due to the loss of one electron.
Xenon does not readily form an ion.
The most common ion for gold is Au3+, known as the auric ion.
The common simple ion is S-2 and the most common polyatomic ion is probably SO4-2.