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Mass number of SO42-

Accepted Answer

The sulfate ion (SO42-) does not have a mass number. Mass number is a property of individual atoms, not polyatomic ions. It represents the total number of protons and neutrons in an atom's nucleus. The sulfate ion consists of one sulfur atom and four oxygen atoms, each with its own atomic mass. The total mass of the ion can be calculated by adding the atomic masses of the constituent atoms.

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