What is the oxidation state of rubidium (rb)?

The answer is rubidium exhibits +1 and -1 oxidation states.

Explanation:

Rubidium is a reactive element and belongs to the group 1 of the periodic table. It is an alkali metal and it is a highly reactive element.

Rubidium is a very soft and white lustrous element. Rubidium has +1 and -1 oxidation states. When rubidium is burnt, it forms oxides, superoxides and peroxides respectively.

For example, in rubidium oxide (Rb2O), Rubidium has a +1 oxidation state. While in peroxides rubidium exhibits -1 oxidation state. For example Rubidium peroxides (Rb2O2).

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia