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Unformatted text preview: experimental evidence (18031810)
· Dalton’s Atomic Theory: Ø explains the difference between an element and a compound Ø explains two scientific laws, and Ø predicts a new scientific law. 1 Chemistry 101 Chapter 2 DALTON’S ATOMIC THEORY POSTULATES · All matter is composed of indivisible particles called atoms.
· An atom is a very small particle of matter that retains its identity during a chemical change.
· An element is a type of matter composed of only one kind of atom.
· All atoms of a particular element are identical (e.g. they have the same mass)
· A compound is a type of matter composed of atoms of two or more elements chemically combined in fixed proportions. DEDUCTIONS · Gives a more precise definition for an element. · Give a more precise definition for a compound.
· Supports the “Law of Definite Composition”.
· Predicts the “Law of Multiple Proportions. · A chemical reaction consists of the · Supports the “Law of rearrangement of atoms from one set Conservation of Mass”
of combination to another.
· Atoms are not created or destroyed, but are rearranged. 2 Chemistry 101 Chapt...
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