Lecture_9_Periodic_Table_Organizing_the_Elements

Lecture_9_Periodic_Table_Organizing_the_Elements - UNIT...

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U N I T 1 L E C T U R E N O T E S LECTURE 9 Periodic Table: Organizing the Elements GENERAL CHEMISTRY Fall 2009 Updated: 11/22/2011
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A. History a. Greeks proposed that all matter was composed of four fundamental substances: fire,  earth, water, and air. b. Alchemists discovered mercury, sulfur, and antimony. c. Robert Boyle insisted science should be grounded in experiments; defined an  element as a substance that could not be broken down.  3.1 The Elements 1. 88 elements occur naturally; other elements are man-made (made in particle  accelerators)  2. Living systems a. Elements in living systems: CHNOPS  b. Trace elements in living systems i. Elements in small amounts 3. Multiple meanings of elements a. Single atom b. Large sample enough to weigh on a balance 3.2 Symbols for the Elements A. Names  Some element names are derived from Latin or Greek names B. Symbols (abbreviations of chemical elements) Rules must be followed 1. First letter is capitalized 2. Second letter must be lowercase
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Lecture_9_Periodic_Table_Organizing_the_Elements - UNIT...

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