Also known as: ER-, ER+, ER(-)
ER stands for various terms. Discover the full forms, meanings, and possible interpretations of ER across different fields and industries.
Symbol:"Er" Atomic Number:"68" Atomic Mass: 167.26amu. Erbium is one of the elements in the lanthanide series of inner transition elements. It may also be classified as a rare earth element.
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