Which of the following is considered the basic unit of matter?

• A. Electron
• B. Molecule
• C. Atom
• D. Proton

Answer: (C)

Verified step by step guidance

1. Understand the question: It asks for the basic unit of matter, which means the smallest component that retains the properties of an element.
2. Review the options: Electron, Molecule, Atom, and Proton.
3. Recall definitions: An electron is a subatomic particle with a negative charge; a proton is a positively charged subatomic particle; a molecule is a group of atoms bonded together.
4. Identify the basic unit: The atom is the smallest unit of an element that maintains its chemical properties and consists of protons, neutrons, and electrons.
5. Conclude that the atom is considered the basic unit of matter because it forms the building blocks of all substances.