The only oxyanion of the given ions is [tex]\boxed{{\text{S}}{{\text{O}}_4}^{2 - }}[/tex].
Further explanation:
The oxyanions are formed by the combination of oxygen with several large other elements. The elements may include first row elements as in the trigonal planar oxyanions. The examples of oxyanions of first row elements are carbonate and nitrate. This may also include second-period elements such as tetrahedral oxyanions. The examples of oxyanions of second row elements are phosphate or sulfate.
Oxyanions may be monomeric or polymeric in nature. For example, the perchlorate or chlorate ions are monomeric while the metavanadate, silicates, and polyphosphate are polymeric oxyanions.
The name of any particular oxyanion derives its name from the element that is present at the center of an oxyanion followed by a suffix “ate”. For instance, the anion borate is derived from the element boron with the suffix “ate” attached at the end.
Out of the five compounds, the only anion that is formed from the combination of oxygen and second-row element is sulfate [tex]\left( {{\text{S}}{{\text{O}}_4}^{2 - }} \right)[/tex]. In the sulfate anion, the central sulfur is at center of the tetrahedral and four equivalent oxygen occupy the four corners of a tetrahedron. (Refer to the attached image).
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: anion, oxyanions, trigonal planar, tetrahedral, oxygen, sulfur, sulfate anion, second row element, periodic properties,oxyanions.
