There are several different models that represent compounds. One type of model is shown.

A large black sphere connected to 4 small blue spheres by 4 grey sticks.
What type of model is shown?

a structural formula
a chemical formula
a space-filling model
a ball-and-stick model

1 answer

The model you described, which consists of a large black sphere connected to 4 small blue spheres by 4 grey sticks, represents a ball-and-stick model. In these models, the balls represent atoms, and the sticks represent the bonds between them.