This is a transition metal. This is a metal of the platinum family and it is the most corrosion-resistant metal known. It is used in the production of the alloys with osmium and platinum and in the production of crucibles and devices requiring high temperatures.
This element is a transition metal used in large amounts by the electrical industry in the form of wire. This metal is the second-best in the electrical conductance. Because this element resists corrosion in air, moisture and seawater, it has been widely used in coins.
This element is classified as an actinide and it is solid at room temperature. It is a synthetic transuranic element and can be produced in kilogram quantities. It is used in smoke detectors and as a portable source of gamma rays.