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Matic Lozinšek and Gary J. Schrobilgen consider krypton — namesake of Superman's home planet — its superoxidant compounds, and their roles in coaxing elements into their highest oxidation states.
From secretive beginnings to serving in missions on Mars, Rebecca J. Abergel and Eric Ansoborlo take a look at the glowing mark curium has left on contemporary science and technology.
Giovanni Baccolo relates tales of tantalum, an element known, and named, for its inertness, yet one that holds some surprises, such as a naturally occurring nuclear isomer.
Eric Ansoborlo and Richard Wayne Leggett discuss the chemical and radiological characteristics that make caesium a captivating element but also a troublesome contaminant.