which model does not represent an element?

which model does not represent an element?

which model does not represent an element?

Answer

Brief Explanations:

An element is made up of only one - type of atom. The first and third models have only one - type of particle (orange and blue respectively), representing elements. The second model has two different types of particles (green and white), representing a compound, not an element.

Answer:

The second model (with green and white particles)