Give three drawbacks of Dalton’s atomic theory?
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DRAWBACKS OF DALTON’S ATOMIC THEORY
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons.
According to Dalton, the atoms of same element are similar in all respects. However, atoms of some elements vary in their masses and densities. These atoms of different masses are called isotopes. For example, chlorine has two isotopes with mass numbers 35 and 37.
Dalton also claimed that atoms of different elements are different in all respects. This has been proven wrong in certain cases: argon and calcium atoms each have an atomic mass of 40 amu. These atoms are known as isobars.
Answer:
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).
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u can write any 2 drawbacks from the above.
:) hope that helpes !!
Explanation: