L1-Properties_of_Atoms

L1-Properties_of_Atoms - Whats the Matter? Part I...

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Part I Properties of Atoms 1 What’s the Matter? Democritus Matter is composed of individual discrete particles called atomos. “a” = “not” “tomos” = “cut” atomos = “not cuttable” atoms 2 What’s the Matter? Democritus John Dalton 3 Dalton’s Atomic Theory 1.An element is composed of extremely small, indivisible particles called atoms. 2.All atoms of a given element have identical properties that differ from those of other elements. 3.Atoms cannot be created, destroyed or transformed into atoms of another element. 4.Compounds are formed when atoms of different elements combine with another in small whole-number ratios. 5.The relative numbers and kinds of atoms are constant in a given compound. 4
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Modern Defnitions and Terms atom: the smallest particle oF an element that maintains its chemical identity through all physical and chemical changes made oF three Fundamental particles protons (p or p + ) neutrons (n or n 0 ) electrons (e - ) 5 molecule: the smallest particle oF an element or
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L1-Properties_of_Atoms - Whats the Matter? Part I...

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