chemistry

Properties of Different Bonds An ionic compound forms from a nonmetal and metal element. A covalent compound is formed by two non metal elements. A metallic compound is formed by two metal elements. Metallic compounds have generally high melting points, are loose and flexible with their electrons, conduct electricity well, and have low solubility in water. Ionic compounds are generally crystals, have a high melting point, and usually have high solubility in water and conduct electricity well when dissolved in water. Covalent compounds have individual molecules, have a low melting point, and do not conduct electricity, and their solubility in water depends on the type of covalent bond. In the melting point test, the test tube was with a substance which was picked up and held over the blue cone of fire for approximately 7 seconds. If the substance was melting, then the substance being tested had a low melting point. For the solubility test, a small amount of compound was placed into an Erlenmeyer flask and 10 mL of water was added. The flask was swirled and observed for one minute. If the sample dissolved, then it had high solubility in water. For the conductivity test, the two ends of the tester probe were held near the dry sample to see if the sample would conduct electricity. If the light flashed on, then the substance conducted electricity. The two ends of the probe were held away from each other in the dissolved form of the substance and if the light flashed on, then the substance conducted electricity when dissolved. I think substance 1 is a covalent compound. This is because it had a low melting point during the melting point test. Substance 2 might be a metallic compound because it had a high melting point but also low solubility in water. I think substance 3 is an ionic compound because it had a high melting point and solubility in water. Substance 4 may be a metallic compound because it has a low melting point. Substance 5 might be an ionic compound because it conducted electricity when dissolved and had a high melting point and had high solubility in water but did not conduct electricity when dry.