atomic number 89

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Definitions from WordNet

Noun atomic number 89 has 1 sense

actinium, Ac, atomic number 89 - a radioactive element of the actinide series; found in uranium ores
--₁ is a kind of chemical element, element
--₁ is a substance of uranium ore

Definitions from the Web

Atomic Number 89

Definition: Atomic number 89 refers to the number of protons found in the atomic nucleus of the chemical element actinium. It is a unique identifier for actinium in the periodic table.

Part of Speech: Noun

Sample Sentences:

The atomic number 89 for actinium demonstrates its placement in the periodic table.
Knowing the atomic number 89 of actinium is essential for understanding its chemical properties.
The atomic number 89 indicates that actinium has 89 protons in its nucleus.

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