Question 10

Sulfur is an example of an element.

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Sulfur is a fundamental chemical element with the symbol 'S' and atomic number 16, making it a clear example of an element.

A) Sand

Sand is not an element; it is a mixture primarily composed of small particles of minerals and rocks, mainly quartz. As such, it can be separated into different components and is not a pure substance.

B) Salt

Salt, specifically sodium chloride (NaCl), is a compound formed from the chemical combination of sodium and chlorine. Compounds consist of two or more elements that are chemically bonded together, which disqualifies it from being classified as an element.

C) Sulfur

Sulfur is indeed an element, characterized by its unique properties and inability to be broken down into simpler substances. It exists in various allotropes and is essential in various chemical processes, confirming its classification as an elemental substance.

D) Sawdust

Sawdust is a byproduct of cutting, grinding, or sanding wood and consists of small wood particles. It is a mixture of various organic compounds and therefore does not represent a single chemical element.

Conclusion

Sulfur stands out as the only option that meets the criteria of being a pure element, while the other choices are either mixtures or compounds. Recognizing the distinction between elements, compounds, and mixtures is essential in understanding the fundamental building blocks of matter. Thus, sulfur's classification as an element is definitive, while all other options fail to qualify.