Lecture_08_101111 - Lecture 8: Periodic Table and the Atom...

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Lecture 8: Periodic Table and the Atom Goal: Be able to name elements and identify their correct symbol. Use the periodic table to identify the group and period of an element. Be able to assign an element as a metal, nonmetal or metalloid. Describe the components of the atom. Outline (Timberlake Chapter 3.1-3.5): ± Elements and Symbols (3.1) ± The Periodic Table (3.2) ± The Atom (3.3) ± Atomic Number and Mass Number (3.4) ± Isotopes and Atomic Mass (3.5) Problems for Extra Practice: 3.1, 3.3, 3.5, 3.7, 3.9, 3.11, 3.13, 3.15, 3.19, 3.23, 3.25, 3.27, 3.29, 3.31, 3.33, 3.35, 3.38, 3.39
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Elements are • pure substances that cannot be separated into simpler substances by ordinary laboratory processes • the building blocks of matter gold carbon aluminum Elements
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A symbol • represents the name of an element • consists of 1 or 2 letters • starts with a capital letter (No vs. NO) Examples: 1-Letter Symbols 2-Letter Symbols C carbon Co cobalt N nitrogen Ca calcium F fluorine Al aluminum Symbols of Elements http://elements.vanderkrogt.net/chemical_symbols.php
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• Some symbols are derived from Latin names, as shown below. • Some elements are named for planets, mythological figures, minerals, colors, scientists, and places. Sources of Element Names Cu, copper (cuprum) Au, gold (aurum) Ag, silver (argentum) Fe, iron (ferrum) Es, Einsteinium Np, Neptunium Cf, californium Rh, rhodium http://www.ptable.com/
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Some Common Elements
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Physical Properties of Elements The physical properties of an element • are observed or measured without changing its identity • include the following: shape, color, odor, taste, density, melting point, boiling point
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Select the correct symbol for each of the following: A. Calcium 1) C 2) Ca 3) CA B. Sulfur 1) S 2) Sl 3) Su C. Iron 1) Ir 2) FE 3) Fe Learning Check
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Select the correct name for each symbol. A. N 1) neon 2) nitrogen 3) nickel B. P 1) potassium 2) phlogiston 3) phosphorus C. Ag 1) silver 2) agean 3) gold Learning Check
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The Periodic Table • Dmitri Mendeleev created first periodic table in 1862 (60 elements known) – Arranged in groups with similar properties – Order of increasing mass – Was able to predict properties of yet undiscovered elements
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The Periodic Table
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Essential Elements
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On the periodic table Groups contain elements with similar properties and are arranged in vertical columns.
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This note was uploaded on 01/18/2012 for the course CHEM 120A taught by Professor Leahmiller during the Fall '11 term at University of Washington.

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Lecture_08_101111 - Lecture 8: Periodic Table and the Atom...

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