Question

multiple choice question
atoms are extremely small particles and are composed of ______.

molecules and cells.
protons, neutrons, and electrons.
a nucleus, cytoplasm, and membrane.
molecules, tissues, and organs.

Explanation:

• Molecules are made of atoms, cells are biological units—incorrect.
• Atoms have a nucleus (protons/neutrons) and electrons—correct.
• Nucleus, cytoplasm, membrane are cell structures—incorrect.
• Molecules/tissues/organs are biological/chemical structures above atom level—incorrect.

Answer:

B. protons, neutrons, and electrons.