What are consistent with Dalton's atomic theory as it was originally stated Why a Calcium and titanium atoms have the same mass?

Answer 1

The atomic weight of calcium is 40,078.

The atomic weight of titanium is 47,867.

----

Dalton principles not accepted today:

1. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. But: Isotopes of a chemical element are not identical.

1. Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
2. But: From many time nonstoichiometric componds are known.

3. Atoms cannot be subdivided, created, or destroyed.But: This is valid only for chemical methods.