A substance made of only one type of atom is known as an __________.

A) Element

B) Compound

C) Molecule

D) Ion

Correct Answer:

A) Element

Explanation:

A substance composed of only one type of atom is called an “element.” Elements are the fundamental building blocks of matter and cannot be broken down into simpler substances by chemical means. Compounds, molecules, and ions involve the combination of multiple atoms or elements. Option B refers to a combination of different elements, option C describes a group of bonded atoms, and option D represents an atom or group of atoms with a net electric charge.