First Uses of the Periodic Table Element – Barium. Barium is a fascinating element with a long history of use in various industries and scientific research. Dating back centuries, the first recorded uses of barium can be traced to its discovery in the 17th century by a chemist named Carl Scheele.
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First Uses of the Periodic Table Element – Astatine.Astatine is one of the rarest elements on Earth, with only tiny amounts existing in nature. It is a highly radioactive element and was first discovered in 1940 by a team of scientists led by Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segrè.