Compounds Quiz 1

Compounds Quiz 1 - 2 12 10 2 lost(2pts 4 Write the correct...

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CHEM 120 Chapter 4 Compounds and Their Bonds Practice Quiz 1 Name _____________________________________ (1pt) 1. What is the octet rule? All atoms (except H and He) need 8 electrons around it to be stable (1pt) 2. How many electrons will oxygen gain or lose when it forms an ion? Oxygen will gain 2 electrons when it forms an ion (2pts) 3. Complete the following table for atoms or ions: Atom or ion Number of protons Number of electrons Electrons lost/gained K + 19 18 1 lost Mg
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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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