Does every solid have an odor?

No

Explanation:

If you walk around where ever you are start picking up random things and write down what they smell like. Some things will smell like straight up air :)

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.