atomic number

Example Sentences

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One of the most critical rare earths is dysprosium, atomic number 66 on the periodic table.

From The Wall Street Journal • Oct. 11, 2025

In HAADF-STEM images, signal intensity correlates with the square of the atomic number, making it particularly useful for analyzing heavy elements.

From Science Daily • May 13, 2024

Katie Hafner: Uranium is the last of the naturally occurring elements on the periodic table, with an atomic number of 92.

From Scientific American • Sep. 7, 2023

For in truth, how does it really benefit most of us to know why sodium’s atomic number is 11 and magnesium’s 12?

From Washington Post • Apr. 28, 2023

The horizontal rows, meanwhile, arrange the chemicals in ascending order by the number of protons in their nuclei–what is known as their atomic number.

From "A Short History of Nearly Everything" by Bill Bryson