Question

what is the atomic number of sulphate

Answer 1

↪Answer↩

Atomic number is for only elements.

Sulphate is radical.

Answer 2

Atomic number of Sulfate

• The number which denotes the number of protons present in the element is called the atomic number.
• Usually, the atomic number is assigned for only a single element and not for ions, because ions have charges.
• In the given case, sulfate as polyatomic anion with the chemical formula $SO_4^{2-}$.
• This ion is made up of two element namely sulfur and oxygen whose atomic numbers are 16 and 8 respectively.
• It means that sulfur has 16 protons, whereas oxygen has 8 protons. When sulfate is considered, the number of proton calculation is as follows:

$SO_4^{2-}$ = 1(16) + 4(8) + 2 = 16+ 32 + 2 = 50.

• When we considered 50 as an atomic number of sulfate, it will be a problem because, element tin has 50 as its atomic number.
• Thus it can be inferred that there is no atomic number for sulfate as it is an anion.

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