This arrangement of electrons shown in figure 263a

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: er H2 or CH4 in that it contains a double bond. C2 H4 is an unsaturated hydrocarbon. We will see later that the double bond allows many C2 H4 molecules to react to form the polymer polyethylene. ....................................................................................................................................... EXAMPLE 2.6–3 Use either of the shorthand electron notations shown in Figure 2.6–2 to depict the covalent bonding arrangement in each of the following materials: (a) H2 O, (b) C2 H6 , (c) C2 H3 Cl, and (d) Si. Solution The number of covalent bonds formed is directly related to the number of valence electrons Nv in an atom (Equation 2.6–2). From Appendix A, Nv H 1 , Nv C 4 , Nv O 6, Nv Cl 7, and Nv Si 4. a. In the H2 O molecule the O atom will form one covalent bond with each of the H atoms. This arrangement of electrons, shown in Figure 2.6–3a, allows all three atoms to obtain filled valence shells. H O H or H O H H (a) H C C H H H H H C H (b) H C or H H H H H C C H H Cl H C C H or Cl (c) | v v FIGURE 2.6–3 Schematic illustrations of the covalent bond structure in a series of compounds: (a) H2 O, (b) C2 H6 , and (c) C2 H3 Cl. The x’s represent the electrons from the H and Cl atoms and the •’s and ’s represent those from the C and O atoms. Note the double bond in the compound C2 H3 Cl. | e-Text Main Menu | Textbook Table of Contents 47 pg048 [V] G2 7-27060 / IRWIN / Schaffer pg794 [V] Part I pgm 1-19-98 plm 3-21-98 MP Fundamentals Glossary b. In 794C2 H6 molecule each H atom is bonded to one of the C atoms. Since each C atom the must form four covalent bonds, there is a single covalent bond bridging the two C atoms (see Figure 2.6–3b). c. In the compound C2 H3 Cl each H and Cl atom forms a single covalent bond with one of bond angles the C atoms. Each C atom The form four covalent bonds, so that there will be a double must characteristic angle between an atom bond between the two C atoms (see Figure 2.6–3c). or ion and two of its n...
View Full Document

This note was uploaded on 02/25/2013 for the course PHYS 2202 taught by Professor Sowell during the Spring '10 term at Georgia Tech.

Ask a homework question - tutors are online