Amongst the following statements, that which was not proposed by Dalton was :

all the atoms of a given element have identical properties including identical mass. Atoms of different elements differ in mass.

chemical reactions involve reorganisation of atoms. These are neither created nor destroyed in a chemical reaction.

when gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same $\mathrm{T} \& \mathrm{P}$.

matter consists of indivisible atoms.