Section 1
History of Atomic Structure
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Boundless Chemistry
Chemistry
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5 concepts
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Early Ideas about Atoms
The concept of the atom as an indivisible building block of matter was recorded as early as the 5th century BCE.
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The Law of Conservation of Mass
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed.
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The Law of Definite Composition
The law of definite composition states that chemical compounds are composed of a fixed ratio of elements as determined by mass.
The Law of Multiple Proportions
The law of multiple proportions states that elements combine in small whole number ratios to form compounds.
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John Dalton and Atomic Theory
Dalton introduced a theory that proposed that elements differed due to the mass of their atoms.