Biologists use ball-and-stick models to study complex molecules by representing atoms with balls and bonds with sticks. dna is a biological molecule that contains millions of atoms. what is a limitation of using a ball-and-stick model for dna?

The disadvantages of a Balla and Stick model are:
It has a lot of parts and therefore, building the model consumes a lot of time. 
Secondly, only single bonds are shown in the same. The double or triple bonds, as well as the atom containing the lone of a pair of electrons, are not demonstrated in this model.

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other