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Chemistry worksheet focusing on atomic number and mass number calculations for various elements.

A chemistry worksheet titled "Atomic Number and Mass Number" with a table listing elements, their atomic numbers, number of protons, number of neutrons, and mass number, along with questions at the bottom.

A chemistry worksheet titled "Atomic Number and Mass Number" with a table listing elements, their atomic numbers, number of protons, number of neutrons, and mass number, along with questions at the bottom.

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