# Which statement is INCONSISTENT with Dalton's atomic theory?

## $\text{i. Atoms are hard, indivisible spheres;}$ $\text{ii. Atoms are composed of smaller particles;}$ $\text{iii. Atoms combine in definite ratios;}$ $\text{iv. Atoms possess definite masses.}$

Clearly, $i i .$ is inconsistent (or does not follow from) with Dalton's atomic theory.
$i i .$ describes a nuclear property, not a chemical property. Of course, Dalton could not interrogate nuclear processes, and his ideas about atoms and molecules were inferences from known chemistry.