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\nDalton's Vision: The Birth of Atomic Theory\n\n

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\nIn 1803, John Dalton formulated his renowned theory of atoms. The principal tenets of his theory were as follows: ₷ Atoms were thought to be the smallest, hardest, densest, and indivisible particles of matter. Every element is made up of...\nIn 1803, John Dalton formulated his renowned theory of atoms. The principal tenets of his theory were as follows: ₷ Atoms were thought to be the smallest, hardest, densest, and indivisible particles of matter. Every element is made up of a specific type of atom.\r
The variations in atom types within elements account for their distinct properties.The law of chemical combination finds a satisfactory basis in this theory.Atoms are unbreakable, meaning they cannot be formed or destroyed.\r
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Negative aspects\r
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It is unable to clarify why different types of atoms should have different mass, valency, etc.\r
The identification of isotopes and isobars demonstrated that atoms belonging to the same element can have distinct\r
Atoms of various types may share the same atomic mass (isobars), as well as atomic masses (isotopes).\r
The late 19th century saw the discovery of several subatomic particles, including protons, electrons, and X-rays.\r
century gave rise to the notion that the atom was no longer the smallest and most indivisible unit of matter.\n
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Media Length
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4:30
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Grade
9th - Higher Ed
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Subjects
Science
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Instructional Videos
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Source:
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\nAudio Visual Representation of Chemistry\n\n
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Date
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2024
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Language
English
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For Teacher Use
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Fine Print: Educational Use
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Concepts

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atomic theory, oxygen, water, elements, atoms, matter, compounds
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oxygen atom, hydrogen element, fixed proportion, chemical reaction, chemical composition, silk cloth, negatively charged, atomic particles, glass rods, hydrogen atoms, john dalton, theory, shown, indivisible, experiment, atom, rods, dalton, divisible, proposed, composed, tiny, part
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