Yes, a neutron is much smaller than an atom. Here's why:

* Atoms are made of neutrons, protons, and electrons. The nucleus of an atom contains protons and neutrons, while electrons orbit around the nucleus.

* Neutrons are subatomic particles. They are one of the fundamental building blocks of atoms.

Think of it like this:

* An atom is like a house.

* Neutrons, protons, and electrons are like the bricks, mortar, and windows that make up the house.

You wouldn't say a brick is smaller than a house, right? It's the same with neutrons and atoms.