Arrange the Following in Terms of Increasing (From Left to Right)number

Arrange the following in terms of increasing (from left to right) number of electrons in the valence shell.Bi³⁺, Sn²⁺, Te^2-, I, Rb⁺

A) Rb⁺, Sn²⁺, Te^2-, I, Bi³⁺
B) Bi³⁺, Sn²⁺, Te^2-, I, Rb⁺
C) I, Rb⁺, Bi³⁺, Te^2-, Sn²⁺
D) Sn²⁺, Bi³⁺, Te^2-, I, Rb⁺
E) Rb⁺, Sn²⁺, Bi³⁺, I, Te^2-