atomic number 68

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Definitions from WordNet

Noun atomic number 68 has 1 sense

erbium, Er, atomic number 68 - a trivalent metallic element of the rare earth group; occurs with yttrium
--₁ is a kind of metallic element, metal
--₁ is a substance of gadolinite, ytterbite; fergusonite

Definitions from the Web

Atomic Number 68

Noun:

An atomic number is a unique number assigned to each element in the periodic table based on its number of protons. Atomic number 68 refers to the element erbium, a rare earth metal.

Sample Sentence:

The atomic number 68 of erbium indicates that it contains 68 protons in its nucleus.

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