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Chapter 3 Chemistry

TermDefinition
Democritus As early as 400 B.C. He believed that everything was made up of smaller particles called Atoms.
Atomic Theory in the late 1700s Chemist believed that elements could not be broken down by regular chemical needs. They also believed that elements could combine to form new compounds.
The study of matter in the 1790s It was revolutionizing which led to the discovery of several atomic laws
The Law of Conservation of Mass States that matter cannot be created or destroyed
No matter how pure a _________ __________ is prepared, it is still made up of a ___________ __________ of ________________. chemical compound, fixed proportion, elements
__________ can form more than ___ compound Elements, 1
Carbon Dioxide & Carbon Monoxide are both made up of ___________ Carbon
John D, Dalton An english school teacher during 1808. proposed a theory for the Law of Conservation of mass
First Law of Dalton's Atomic Theory? All Matter is composed of ultimately small particles called atoms.
Second Law of Dalton's Atomic Theory? Atoms of a given element are identical in size, mass, & other properties. Atoms of different elements differ in size, mass, & other properties
Third Law of Dalton's Atomic Theory? Atoms cannot be subdivided, created, or destroyed
Fourth Law of Dalton's Atomic Theory? Atoms of different elements combine in simple whole number ratios to form chemical compounds.
Fifth Law of Dalton's Atomic Theory? In chemical reactions, atoms are combined, separated, or rearranged
The Law of Conservation of Mass According to John Dalton Explained by the fact that atoms are simply rearranged or separated during chemical reactions.
The Law of Definite Proportion results from the fact that: A given chemical compound is always composed of the same combination of atoms
The Law of Multiple Proportions states that: A given chemical compound always contains the same ratio of atoms
Atom: The smallest particle of an element that still contains the element’s properties
Created by: Victoria.V
 

 



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