Lecture_4 Atomic structure, name compounds, predict formulas

Lecture_4 Atomic structure, name compounds, predict...

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Chem 1A Lecture 4
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Announcements There is still space in Chem 1AL Friday 1-3:50 (10 spaces) Friday 5-8:50 (16 spaces) 2
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Today’s Topics Atomic Structure The strong force, quarks, leptons Review periodic table Predict formulas Name compounds
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Cations and Anions Cation : Lost electrons => positive charge 197 Au 3+ Anion : Gained electrons => negative charge 16 O 2
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Anion How many protons, electrons and neutrons are there in the ion, 16 O 2 ?
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Cation How many electrons are there in the ion, 197 Au 3+ ? a) 82 b) 76 c) 79 d) 200 e) 194
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Question An element’s most stable ion forms an ionic compound XCl 2 . If the ion of element X has 36 electrons, what is the identity of the element? a) Kr b) Se c) Sr d) Rb e) None of the above
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What is the World Made of ? Ancient times – four elements: earth, water, air and fire 19 th century – atoms Early 20 th century – electrons, protons, neutrons Today – quarks and leptons
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Four Forces There are four fundamental interactions in nature All forces can be attributed to these interactions Gravity is attractive; others can be repulsive Interactions are also
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This note was uploaded on 09/09/2011 for the course CHEM 1A taught by Professor Van koppen during the Spring '07 term at UCSB.

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Lecture_4 Atomic structure, name compounds, predict...

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