Ascending structural order in matter: Arrange Electron, Atom, Molecule, Matter from smallest constituent to bulk level.

Introduction / Context:
Physical structure builds from subatomic particles to macroscopic matter. We must order the given entities from smallest to largest.

Given Data / Assumptions:

• Entities: Electron, Atom, Molecule, Matter.

Concept / Approach:
Electrons are subatomic particles; atoms contain electrons (and a nucleus); molecules consist of bonded atoms; matter is bulk material made of enormous numbers of molecules/atoms.

Step-by-Step Solution:
Smallest: Electron.Next: Atom.Next: Molecule.Largest level: Matter.

Verification / Alternative check:
Any introductory chemistry or physics text confirms this hierarchy.

Why Other Options Are Wrong:
They misplace molecule before electron or place matter among microscopic constituents.

Common Pitfalls:
Confusing “atom vs molecule” (some substances are monoatomic but a molecule, when present, is built from atoms).

Final Answer:
Electron, Atom, Molecule, Matter