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5 Theories on Atomic Structure Atomic-Structure-Discovery-of-Subatomic…
5 Theories on Atomic Structure 
Dalton's Atomic Theory
John Dalton proposed the notion of chemical combination in 1803. It is based on the following premises:
1) Elements are made up of indivisible tiny units called atoms.
2) All atoms of the same element are the same; other elements have various atom kinds.
3) Atoms are not generated nor destroyed.
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Rutherford's Hypothesis
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According to Rutherford's theory, an atom's nucleus is surrounded by electrons that are negatively charged. He also asserted that the electrons that surround the nucleus travel in a circular pattern at extremely high speeds. He gave these elliptical routes the name orbits.
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Thomson's Theory
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He thought and modeled how atoms consist of positive and negative charges, present in equal amounts so that an atom would be electrically neutral
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Strengths: Bohr's atomic model satisfactorily explains the spectra of species having one electron
Weakness: ts inability to provide sufficient information and explanation for atoms other than the smaller ones
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modified the atomic structure model by explaining that electrons move in fixed orbitals (shells) and not anywhere in between and he also explained that each orbit (shell) has a fixed energy.
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