to discover krypton, neon and xenon (1898). It was debated whether the 'inert' monoatomic gases belonged to the periodic table owing to their lack of 'chemical properties'; elements coming late to ...

Unlike other elements reportedly gathered by Lidden, the plutonium sparked a major hazmat alert, requiring a response from the Australian Border Force (ABF) officials, firefighters, and police. He and ...

Emmanuel Lidden from Australia took it as a real challenge: he wanted to collect all the elements of the periodic table. But ...

A 24-year-old Australian man could go to jail for ten years as he prepares to plead guilty for importing plutonium from a ...