Sigma noise suppression and protection inductor chips from Tyco Electronics can help protect circuits in a variety of ways. elements, through to switched options with shafts in either plastic or metal.The valence electron configuration 5s1 corresponds to rubidium. Metals of Groups IA, IIA, and IIIA form positive ions with a charge equal to the group number of the metal. This element has 1 valence electrons, so it is in group 1A.Download a printable version of the Periodic Table of Elements in PDF format In addition to the information contained within the Periodic Table of Elements, the following articles may be helpful if you are writing a report about an element or if you are making a model of an atom.