Question

10. A molecule of sulfur has eight atoms. It is ________ .

• A. An element
• B. A compound
• C. A mixture
• D. Not matter

Answer 1

The correct option is A

An element

Explanation for correct option:

Option (A): Sulfur is an element and exists as ${\mathrm{S}}_8$. It means that eight atoms of sulfur combine to form a molecule of sulfur. So, ${\mathrm{S}}_8$ is called a molecule of an element.

Explanation for incorrect options:

Option (B): A compound is defined as a pure substance that is made up of two or more elements in a fixed ratio by mass. For example, water $\left({\mathrm{H}}_2\mathrm{O}\right)$ is a compound that is formed when two atoms of hydrogen $\left(\mathrm{H}\right)$ combine with one atom of oxygen $\left(\mathrm{O}\right)$.

Option (C): A mixture is formed when two or more substances are combined in any ratio. For example, the sugar solution is a mixture.

Option (D): Matter is any substance that occupies space and has mass. Table, air, water, etc. are all examples of matter.

Hence, option (A) is the correct answer. A molecule of sulfur has eight atoms. It is an element.