what new characteristic did john dalton add to the model of the atom?\nan atom is a round, solid mass.\nan…

Brief Explanations:

John Dalton proposed that atoms are the smallest units of matter and that they can combine with other atoms to form compounds. His atomic theory included the idea of atoms joining with other kinds of atoms. The idea of an atom being a round, solid mass was part of earlier concepts and not a new - characteristic by Dalton. The idea of a massive, positive center was proposed by Rutherford. The idea that an atom is made up of smaller particles came later with the discovery of sub - atomic particles like electrons, protons, and neutrons.

Answer:

An atom can join with other kinds of atoms.