CHEM151Chapter 5

Chemistry (MasteringChemistry Series)

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9/9/2008 1 C HAPTER 5 Periodicity and 1 Atomic Structure DEVELOPMENT OF THE PERIODIC TABLE | Mid-1800’s, several scientists placed known elements in order based on different criteria. y Atomic mass, mp, bp, ant etc… | Mendeleev’s and Meyer’s versions, 1869 MODERN ARRANGEMENT | Arranged by increasing atomic number
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9/9/2008 2 WHAT’S GOING ON INSIDE THE ATOM? | Once scientists developed a logical order for the elements they began studying the structure and composition of individual atoms. | They used substances’ interactions with light to explain the structure of atoms and develop a explain the structure of atoms and develop a model to explain how atoms affected properties of light. | In order to understand interactions, we must understand behavior of light. ATOM CONT. | Exercise: Draw what an atom looks like. ATOM CONT. | In order to understand interactions, we must understand behavior of light.
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9/9/2008 3 | Light is typically described as traveling in waves | Electromagnetic Radiation (EM)– electromagnetic
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CHEM151Chapter 5 - 9/9/2008 CHAPTER 5 Periodicity and...

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