Erbium

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a man stands in front of a sign that says erbium on it
the word erbium is written in white on a red background
a small dog standing next to a motorcycle with the text ciao augu
the periodic table of the elements showing the numbers 67 and 68 for holmium and erbium
a man stands in front of a sign that says erbium on it
a cartoon drawing of two cats with the letters er and yb on them