1. Tungsten AUD PS03 2. Mercury 3. Cobalt 4. Lead 5. Sodium III. The Lewis Dot structure of the following 1. Ca 2. Li 3. O 4. MgSO4 5. PC|3 IV. Answer the following problems. 1. You dissolve the first compound in water and observe that it readily dissolves, forming a conductive solution. However, when you try to dissolve it in hexane, a nonpolar solvent, it does not dissolve. The second compound does not dissolve in water but dissolves easily in hexane. Based on these observations, which compound is likely ionic, and which one is likely covalent? 2. When you place electrodes in the solid substance and apply a voltage, no current flows. However, when you do the same with the liquid substance, the bulb in the circuit lights up. Question: Which substance is likely to be ionic, and which one is likely to be covalent?​


1. Tungsten AUD PS03 2. Mercury 3. Cobalt 4. Lead 5. Sodium III. The Lewis Dot structure of the following 1. Ca 2. Li 3. O 4. MgSO4 5. PC|3 IV. Answer the following problems. 1. You dissolve the first compound in water and observe that it readily dissolves, forming a conductive solution. However, when you try to dissolve it in hexane, a nonpolar solvent, it does not dissolve. The second compound does not dissolve in water but dissolves easily in hexane. Based on these observations, which compound is likely ionic, and which one is likely covalent? 2. When you place electrodes in the solid substance and apply a voltage, no current flows. However, when you do the same with the liquid substance, the bulb in the circuit lights up. Question: Which substance is likely to be ionic, and which one is likely to be covalent?​

I. Elements:

1. Tungsten (W)

2. Mercury (Hg)

3. Cobalt (Co)

4. Lead (Pb)

5. Sodium (Na)

II. Lewis Dot structure:

1. Ca: [Ca]2+

2. Li: Li+

3. O: O

4. MgSO4: Mg2+ [SO4]2-

5. PC|3: P with 3 Cl around it

III. Answers:

1. Likely ionic: Tungsten (Tungsten AUD PS03) dissolves in water but not in hexane, indicating ionic behavior. Likely covalent: Mercury dissolves in hexane but not in water.

2. Likely ionic: Solid Tungsten (Tungsten AUD PS03) does not conduct electricity. Likely covalent: Liquid Mercury conducts electricity.

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