Question

A pure substance which contains only one type of atoms is called:

• A. an element
• B. a compound
• C. a solid
• D. a liquid

Answer 1

The correct option is A an element

Since, every atom is also known as element.
Hence a pure substance containing only one type of atom is called an element, and containing only one type of molecule is called a compound.
Hence, answer is option $A$.