Question

state any four postulates of Dalton's atomic theory of matter .. which of his postulates does not correct at present..

Answer 1

this above photo contains demerits.its postulates are-
i )every matter is made up of very small particles,called atoms
ii)atoms are indivisible which can neither be created or destroyed in a chemical reactions
iii)atoms of same element are alike in every nature
iv)atoms of different particles are different inevery aspects
v)atoms combine in the ratio of small whole number to form compound
vi)the relative number as well as kinds of atoms are constant in a given compound

Answer 2

Dalton's atomic theory of matter
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1) Every elements are made of very tiny particles called atom.

2)Atoms can't be created or destroyed.

3)Atoms of same elements have the same properties but the atoms of different elements don't have the same properties.

4)Atoms of different elements combine in simple,whole number ratios.


Dalton's postulate wasn't really correct.Later many mistakes were found in his postulate.

1)In Dalton's postulate the atoms of same elements have the same properties.But now we know that in Isotopes same elements have different mass number.

Also in Isobars different elements have the same mass number.

2)Atoms can be broken down into proton, neutron and electron.So the invincibility of an Atom is wrong.


Hope it helps.