John Dalton's atomic model primarily introduced the idea that matter is composed of indivisible atoms, which are distinct and represent different elements. Among the characteristics you listed, the one that aligns best with Dalton's contributions is:
An atom can join with other kinds of atoms.
Dalton proposed that atoms can combine in simple whole-number ratios to form compounds, laying the groundwork for our understanding of chemical bonding and reactions. The idea of distinct atoms joining together to form different substances was a significant advancement in atomic theory.