Dictionary search results

Showing 1-2 of 2 results

protactinium British & World English

The chemical element of atomic number 91, a radioactive metal of the actinide series, occurring in small amounts as a product of the natural decay of uranium

Pa in protactinium British & World English

The chemical element of atomic number 91, a radioactive metal of the actinide series, occurring in small amounts as a product of the natural decay of uranium