limitation of dalton atomic
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1. The atom is further subdivided into protons, neutrons and electrons.
2. The atoms of same elements are not similar in all respect. They may vary in mass and density. These are known as isotopes. For example: chlorine has two isotopes having mass numbers 35 a.m.u and 37 a.m.u.
3. Atoms of different elements are not different in all respects. Atoms of different elements that have the same atomic mass are called isobar.
4. According to Dalton atoms of different elements combine in simple whole number ratio to form compounds. This is not seen in complex organic compounds like sugar C12H22O11.
5. The theory fails to explain the existence of allotropes.
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2. The atoms of same elements are not similar in all respect. They may vary in mass and density. These are known as isotopes. For example: chlorine has two isotopes having mass numbers 35 a.m.u and 37 a.m.u.
3. Atoms of different elements are not different in all respects. Atoms of different elements that have the same atomic mass are called isobar.
4. According to Dalton atoms of different elements combine in simple whole number ratio to form compounds. This is not seen in complex organic compounds like sugar C12H22O11.
5. The theory fails to explain the existence of allotropes.
hope it's useful!!
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Answer:
The main drawbacks of Dalton's Atomic Theory are: (i) It could explain the laws of chemical combination by mass but failed to explain the law of gaseous volumes. (ii) It could not explain why atoms of different elements have different masses, sizes, valencies, etc.
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