285 ch2 hw1

285 ch2 hw1 - through electrostatic attraction; Covalent...

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Jixiao Li Maryam EslamlooGrami ENGR 285 January 19, 2010 2.7 P 5+ : 1s 2 2s 2 2p 6 P 3- : 1s 2 2s 2 2p 6 3s 2 3p 6 Sn 4+ : 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 Se 2- : 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 I - : 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 Ni 2+ : 1s 2 2s 2 2p 6 3s 2 3p 6 3d 8 2.11 (a) It’s a halogen because the most outside layer have a s 2 p 5 structure. (b) It’s a transition metal because there is a 3d 7 4s 2 structure, the third layer does not have a full electron structure. (c) It’s an inert gas because the outermost layer has an 8 electron structure. (d) It’s a alkali metal because it has s 1 structure which mean it’s located at IA main group. (e)It’s a transition metal because there is a 4d 5 5s 2 structure; the forth layer does not have a full electron structure. (f)It’s an alkaline earth metal because the s 2 structure mean the element locate at IIA main group. 2.18 (a) Ionic bond is a type of chemical bond that can often form between metal and non-metal ions
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Unformatted text preview: through electrostatic attraction; Covalent bond is characterized by the sharing of pairs of electrons between atoms, or between atoms and other covalent bonds; Metallic bond is the chemical bond, which is characteristic of metals, in which mobile valence electrons are shared among atoms in a usually stable crystalline. (b) Basically, there is no two same quanta may occupy the same quantum state at the same time. In the other word, for two identical fermions, the total wave function is anti-symmetric. 2.19 %ionic character={1-e^[(-0.25)(x A-x B ) 2 ]}100 MgO: 73.35 GnP: 6.06 CsF: 93.43 CdS: 14.79 FeO: 51.45 2.22 Solid xenon: Covalent bond Calcium fluoride: Ionic bond Bronze: Metallic bond Cadmium telluride: Ionic bond Rubber: Covalent bond Tungsten: Metallic bond...
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This note was uploaded on 02/22/2010 for the course ENGR 285 taught by Professor Maryameslamloogrami during the Spring '10 term at Winona.

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285 ch2 hw1 - through electrostatic attraction; Covalent...

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