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Chemistry 1A Chapter 2 What Id be doing if I were you Support for this presentation Read pdf file for Chapter 2 of An Introduction to Chemistry (link on the Chemistry 1A webpage) Read pdf file for Chapter 8 of An Introduction to Chemistry (link on the Chemistry 1A webpage) Or read Chapters 1 and 2 in the text. Group Numbers on the Periodic Table Group Names lkali Metals Alkaline Earth Metals Halogens Noble Gases Characteristics of Metallic Elements Metals have a shiny metallic luster. Metals conduct heat well and conduct electric currents in the solid form. Metals are malleable. For example, gold, Au, can be hammered into very thin sheets without breaking. Metals, Nonmetals, and Metalloids Classification of Elements Solid, Liquid, and Gaseous Elements Atoms Tinyabout 10-10 m If the atoms in your body were 1 in. in diameter, youd bump your head on the moon. Huge number of atoms in even a small sample of an element 1/2 carat diamond has 5 10 21 atomsif lined up, would stretch to the sun. Particles in the Atom Neutron (n) 0 charge 1.00867 u in nucleus Proton (p) +1 charge 1.00728 u in nucleus Electron (e ) 1 charge 0.000549 u outside nucleus Electron Cloud for Hydrogen Atom The Electron If I seem unusually clear to you, you must have misunderstood what I said. Alan Greenspan, Head of the Federal Reserve Board It is probably as meaningless to discuss how much room an electron takes up as to discuss how much room a fear, an anxiety, or an uncertainty takes up. Sir James Hopwood Jeans, English mathematician, physicist and astronomer (1877-1946) Wave Diffraction Patterns Effect on Chemical Changes Electrons Can be gained, lost, or sharedactively participate in chemical changes Affect other atoms through their -1 charge Protons Affect other atoms through their +1 charge... View Full Document

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