Element 99 in our International Year of the Periodic Table series is einsteinium. Einsteinium was almost the first element to be named after a living person and has been used to synthesis other, heavier elements.
Being an element that has to be created in nanogram amounts rather than found, and which decays quickly into other more stable elements, einsteinium doesn’t have any uses or applications of note. It has, however, been used to help make other, heavier elements, including mendelevium, which we’ll meet shortly.
Remember, you can keep track of all of the previous entries in this series on the site here, or on the Royal Society of Chemistry’s dedicated page.