CH_3_LO - CHM 205 Fall 2007 Dr Logan CH 3 Learning...

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CHM 205 Fall 2007 Dr. Logan CH 3 Learning Objectives Chapter 3: Atoms and Elements Know the key equations , found on p. 131, as well as those described below. Interpret, predict, and write formulas for ionic and molecular compounds a. Recognize and interpret molecular formulas, condensed formulas, and structural formulas, as well as other depictions of molecules . b. Recognize that metal atoms commonly lose one or more electrons to form positive ions, called cations, and nonmetal atoms often gain electrons to form negative ions, called anions. c. Recognize that the charge on a metal cation in Groups 1A, 2A, and 3A is equal to the group number in which the element is found in the periodic table (M n+ , n = Group number), and that the ion has the same number of electrons as the noble gas that precedes it. d. Recognize that the negative charge on a single-atom or monatomic anion, X n- , is given by n = 8 – group number, and that the ion has the same number of electrons as the noble gas
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This note was uploaded on 04/05/2008 for the course CHM 205 taught by Professor Dr.logan during the Fall '08 term at SUNY Brockport.

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CH_3_LO - CHM 205 Fall 2007 Dr Logan CH 3 Learning...

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