EXPLAIN DALTON'S ATOMIC THEORY AND IT'S DRAWBACK.
Answers
(i) Matter is made up of very small particles called atoms.
(ii) Atoms can neither be created nor destroyed.
(iii) Atoms of similar substances are similar in all respects (mass, shape and properties)
(iv) Atoms of different substances are different in all respects(mass, shape and properties)
(iv) Atoms of elements combine in the ratio of whole numbers to produce a large number of compound-atoms of a new substance.
Limitations of Dalton’s atomic theory
Dalton’s atomic theory suffered from the following drawbacks:
(i) It failed to explain how and why atoms of different elements combine together to form a new ‘group of atoms’.
(ii) It failed to explain how atoms of different elements differ from each other i.e the structure of atom was unknown.
(iii) It failed to explain the nature of the binding forces between different atoms in a molecule.
(iv) According to Dalton, an atom is indivisible, whereas, it can be divided into sub- atomic particles- electrons, protons and neutrons.
(v) Atoms of the same element can differ from each other.Example – isotopes (atoms of the same element with different masses)
(vi) Atoms of different elements can have same masses (isobars).
the theories of Canada as well as of Democritus and Leukipoos remained forgotten for more than two thousand years .But when the experimental Chemistry developed it became necessary to explain observed facts in 1803 English chemistry John Dalton put forward his atomic theory .
which can be summarised as follows .
1- elements are made of very small particles of matter called atoms .
(delivered from the Greek word atomos).
2- atoms are indivisible .
3- the atoms of an element have the same weight .
4- it is the atoms of element that take part in a chemical reaction .
5- the atoms of different element have different weight .
6- the atoms of an element combine in a simple numerical ratio which dose of another element(s) to form a compound .
who it helpful for you. so, please Mark answer is green list