Question

explain about dalton atomic theroy

Answer 1

Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

Answer 2

Dalton theorised that everything was made of atoms, and atoms are small and indivisible. Further, he argued that every element comprised a collection of the same atoms, i.e, there was a unique atom for every element. He also postulated that molecules were made of combinations of atoms, and that every chemical reaction was a rearrangement of atoms. This is essentially true, although of course we now know that some atoms are divisible (nuclear fission and radioactivity) and he missed out on isotopes, but that was inevitable because at the time the analyses were not accurate enough to be able to pick up on this. The important point of Dalton's theory was that it created a logical basis for studying chemistry.