The charge for the ion of cesium is A: +1.
Cesium (Cs) is an alkali metal found in Group 1 of the periodic table. Alkali metals typically have one electron in their outermost shell, which they tend to lose easily to achieve a stable electron configuration. When cesium loses this electron, it becomes positively charged. Thus, the ionic form of cesium is Cs+, which has a charge of +1.