... by two lines joining the atoms. Each line represents one pair of shared electrons. Ethane C2H4 has a double bond between the two carbon atoms. Co-ordinate (dative covalent) bonding A covalent bond is formed by two atoms sharing a pair of electrons. The atoms are held ... CH4. Four electron pairs arrange themselves in space in what is called a tetrahedral arrangement. A tetrahedron is a regular triangularly-based pyramid. The carbon atom would be at the centre and the hydrogen at the four corners. All the bond angles are 109.5 •X. GIANT COVALENT Network Substance ... are substances lik...

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• Approx Pages: 11
• Grade Level: High School

... iron, bronze, and silver to name a few. They are on the left 3/4 of the periodic table. Some elements are gases, like oxygen and carbon. They are on the right 1/4 of the periodic table. Only a few elements are liquids, mercury and bromine are the most common. The noble gases ... is shared between the two hydrogen atoms and the oxygen atoms. (See Figure 2) On the other hand, the compound that forms carbon dioxide (CO2), forms a double bond. The carbon atom shares two pairs of electrons, four total with the two oxygen atoms. In covalent bonds the combination of atoms that are caused ... ...

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• Approx Pages: 17
• Grade Level: High School

... the atoms are covalently bonded in small groups called molecules. However, a few non-metallic substances have quite different properties compared with those of covalent molecular substances. For example, both carbon and silicon, which are group 14 elements, form oxides with formulas of CO2 and SiO2 respectively, yet the physical properties of these two compounds, are somewhat different. An exception to ... the rule – where covalent substances usually form discrete molecules. In these few cases these substances form a lattice or network of covalent bonds. Examples include silicon dioxid...

• Word Count: 3267
• Approx Pages: 13
• Grade Level: Undergraduate