Arrange the physical entities from the smallest constituent to the largest collection. 1. Atom 2. Matter 3. Molecule 4. Electron

Introduction / Context:
This is another hierarchy question spanning subatomic particles to macroscopic collections.

Given Data / Assumptions:

• Electron is subatomic.
• Atom contains electrons and nucleus.
• Molecule is bonded atoms.
• Matter is bulk composed of atoms/molecules.

Concept / Approach:
Order strictly by structural composition size.

Step-by-Step Solution:
4 Electron (smallest).1 Atom (includes electrons).3 Molecule (two or more atoms).2 Matter (collection of molecules/atoms).

Verification / Alternative check:
Each step aggregates the previous level.

Why Other Options Are Wrong:
Placing matter before electron is not ascending; mixing atom/molecule order contradicts chemistry.

Common Pitfalls:
Confusing matter with state (solid/liquid/gas) rather than scale.

Final Answer:
4 1 3 2