L08-Atomic_Interactions

L08-Atomic_Interactions - Part I Properties of Atoms: The...

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Unformatted text preview: Part I Properties of Atoms: The Periodic Table and Ionization Energies Electronegativity A measure of the relative tendency of an atom to attract electrons to itself when it is chemically combined with another atom unequal sharing of electrons when bonded expressed on the Pauling scale The Pauling Scale 1 2 3 Part II Interactions of Atoms: Formulas Formulas chemical formula: a representation of the number and type of each atom present in the smallest unit of a substance made of elemental symbols and numerical subscripts H 2 O C 6 H 12 O 6 Types of Formulas 1. molecular formula shows the actual number of atoms of each element in the compound C 6 H 12 O 6 H 2 O 2 4 5 6 Types of Formulas 2. empirical formula shows the relative number of atoms of each element in the compound C 6 H 12 O 6 H 2 O 2 CH 2 O HO Types of Formulas 2. structural formula shows the number of atoms of each element in the compound and the bonds between them H 2 O 2 H O O H Using the Periodic Table to Predict Ionic Formulas shows how cations and anions are combined to form a compound sum of the charges is 0 an ionic compound is electrically neutral cations formed from metals loss of electrons anions formed from non-metals gain of electrons 7 8 9 Using the Periodic Table to Predict Ionic Formulas members of a group have the same ionic charge IA The Periodic Table of the Elements VIIIA 1 H 1.008 IIA IIIA IVA VA VIA VIIA 2 He 4.003 3 Li 6.941 4 Be 9.012 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00 10 Ne 20.18 11 Na 22.99 12 Mg 24.31 IIIB IVB VB VIB VIIB VIIIB IB IIB 13 Al 26.98 14 Si 28.09 15 P 30.97 16 S 32.07 17 Cl 35.45 18 Ar 39.95 19 K 39.10 20 Ca 40.08 21 Sc 44.96 22 Ti 47.87 23 V 50.94 24 Cr 52.00 25 Mn 54.94 26 Fe 55.85 27 Co 58.93 28 Ni 58.69 29 Cu 63.55 30 Zn 65.39 31 Ga 69.72 32 Ge 72.61 33 As 74.92 34 Se 78.96 35 Br 79.90 36 Kr 83.80 37 Rb 85.47 38 Sr 87.62 39 Y 88.91 40 Zr 91.22 41 Nb 92.91 42 Mo 95.94 43 Tc (98) 44 Ru 101.1 45 Rh 102.9 46 Pd 106.4 47 Ag 107.9 48 Cd 112.4112....
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L08-Atomic_Interactions - Part I Properties of Atoms: The...

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