How many valence electrons does rubidium have? Leave a Comment / General Finest Reply Rubidium solely has one valence electron in its fifth ring. That locations it within the first column of the Periodic Table, and it’s a an alkaline metallic. Extra Solutions 1 Read More: What tims is 9pm PST in Central time? How many linear ft in 1 acre? Related posts: What is a period of 100 years called? Name something that goes up and down? Which plot description is the best example of a tragedy? What is 1000 divided by 125 equal? What is title IX? READ: Is MgCl2 ionic or covalent?