atomic number 57

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Definitions from WordNet

Noun atomic number 57 has 1 sense

lanthanum, La, atomic number 57 - a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
--₁ is a kind of metallic element, metal

Definitions from the Web

Atomic Number 57

Description:

Atomic number 57 refers to the unique number assigned to the chemical element lanthanum in the periodic table. It is based on the number of protons found in an atom's nucleus.

Sample Sentences:

The atomic number 57 corresponds to the element lanthanum.
Lanthanum, with an atomic number of 57, is commonly used in catalysts and electronic devices.
Do you know the atomic number 57 for lanthanum?

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