Sulfur
Definition and meaning of Sulfur in chemistry.
![Sulfur element card: symbol S, atomic number 16, atomic mass 32.06, electron configuration [Ne] 3s² 3p⁴, oxidation states +6 +4 +2 -2, Nonmetal, group 16, period 3, liquid at room temperature.](/assets/images/terms/sulfur-chemical-element.webp)
Sulfur is a chemical element with the symbol S and atomic number 16. It is an abundant nonmetal that bonds easily with many other elements. At room temperature, it typically forms a bright yellow, crystalline solid.
In more detail
Sulfur sits in group 16 of the periodic table. It rests directly below oxygen as a major member of the chalcogen family. This element exhibits extensive allotropy, meaning it can take many different physical forms.
The most common and stable physical form is known as octasulfur. This form consists of puckered S8 molecular rings that build a distinct yellow crystal. Sulfur is a highly abundant element throughout the universe and our solar system.
On Earth, people often find pure elemental sulfur deposits near active volcanic vents. It is also locked extensively inside common sulfide and sulfate rock minerals. Chemically, pure sulfur burns intensely with a highly distinctive and bright blue flame.
This burning process releases suffocating and toxic sulfur dioxide gas into the air. Sulfur is a vital and completely irreplaceable element in all organic biochemistry. It appears naturally in two essential amino acids called cysteine and methionine.
Amino acids are the basic chemical building blocks that create living proteins. The body needs sulfur to form special connections called disulfide bonds. These strong chemical bonds help fold and stabilize large, complex protein structures.
In modern industry, factories convert most extracted sulfur directly into sulfuric acid. Sulfuric acid remains one of the most heavily produced and crucial industrial chemicals globally.
Key facts
| Field | General Chemistry |
|---|---|
| Symbol | S |
| Atomic number | 16 |
| Atomic mass | 32.06 u |
| Category | Nonmetal |
| State at room temperature | Solid |
Manufacturers widely use sulfur in the chemical vulcanization process of black rubber. Vulcanization uses heat and sulfur to tightly cross-link long polymer chains together. This chemical process drastically improves the elasticity and overall durability of the rubber. Because of this, it is an essential step in making modern automobile tires.
Frequently asked questions
Why do many sulfur compounds smell exceptionally bad?
Many volatile sulfur compounds have a highly distinct and foul odor resembling rotten eggs. Humans have a precise evolutionary sensitivity to them as a warning system.
What is the most common industrial use for elemental sulfur?
Factories use the vast majority of extracted elemental sulfur to manufacture sulfuric acid. This acid is an absolute necessity for producing chemical fertilizers and batteries.
Related terms
Sources & references
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