the.com/europium
the rare earth that snitches on counterfeit euros under ultraviolet light.
means A soft, silvery rare-earth metal (element 63) prized for its glowing red and blue phosphors, used in screens, energy-saving lamps, and the anti-counterfeit inks of euro banknotes.
from Named for the continent of Europe, the way americium honors America and gallium nods to France — chemists like to plant flags in the periodic table. The element was isolated in the early 1900s by the French chemist Eugène-Anatole Demarçay, who teased it out of samples that other workers kept finding 'impure.' 'Europe' itself comes from Greek Eurṓpē, traditionally read as eurys 'wide' plus ōps 'face' (the wide-gazing land), though that reading is more poetic guess than settled fact.
- red glow
- Powers the red phosphor in old TVs
- euro guard
- Glows in genuine euro banknotes under UV
- softest metal
- Most reactive rare earth, soft as lead
- named after
- The only element named for Europe
- oxygen lover
- Tarnishes instantly, stored under inert oil
europium-151 — stable isotope used in neutron activation analysis and nuclear medicine since the 1960s
europium oxide red phosphor — critical material in color crt televisions and fluorescent lamps throughout the 20th century