Answer: erbium

AnswerCrossword Clue
ERBIUMElement discovered in 1843
ERBIUMRare-earth element.
ERBIUMMetallic element
ERBIUMAtomic number 68
ERBIUMRare earth metal
erbiumrare-earth metallic element, having pink salts. Symbol: Er; at. wt.: 167.26; at. no.: 68