Isotope of Bore-on (q.v.) with the half-life of a wet Bank Holiday.

An element that has the most disturbed orbital state of all, formed by the transmutation of chaotic isodopes.

An element that needs to be excluded, on principle, from the Periodic Table, say some. Its specific hazards are described in the tome-like treatise "The Perils of Paulinium" , by Dudley Doright.

A material suited to building the circuitry of an artificial intelligence. (Silicon is clearly capable only of artificial stupidity.)

A source of sheerly, starkly unthinkable coruscating lambent beams of unstoppable energy, and an essential catalyst in the manufacture of unobtanium.

A pivotal element wherein the composite particles oscillate in a clockwise fashion.

Alternates between a rigid state and a malleable state. Over time the malleable periods become more protracted, and the rigid state becomes harder to achieve.

A rare substance found only around Rotheram.

Found in natural weedkillers. Toxic to humans.

Precious metal that is typically provided by or received from an ex-spouse in divorce settlements.

An element that greatly surprised its discoverer.

Originally dismissed as mere hearsay, this element was re-discovered in the Australian jungle and is now used in the advertising business. Not as you might think a halogen, but a different klass altogether.

Electrons capable of several excited states. Difficult to break away from lesser elements.