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Unformatted text preview: 2+ 12 10 2 lost (2pts) 4. Write the correct formula for compound formed between Al 3+ and S 2-. Al 2 S 3 (2pts) 5. Describe the trend in electronegativity going across a period, and across a group. Electronegativity increase across a period and decreases down a group ( 2pts) 6. Predict whether each of the following bonds is ionic, polar covalent or nonpolar covalent: a) Li-F ionic b) Br-Br nonpolar covalent c) C-O polar covalent d) Na-O ionic...
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- Spring '08