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Some characteristic properties that distinguish metallic elements from nonmetallic elements are: 1. Metallic elements have a shiny, lustrous appearance, while nonmetallic elements are generally dull-looking. 2. Metallic elements have high electrical and thermal conductivity, while nonmetallic elements have poor conductivity. 3. Metallic elements are malleable and ductile, while nonmetallic elements are brittle. 4. Metallic elements have high melting and boiling points, while nonmetallic elements have lower melting and boiling points. 5. Metallic elements tend to have positive oxidation states and act as electron donors, while nonmetallic elements tend to have negative oxidation states and act as electron acceptors. 6. Metallic elements typically form ionic compounds with nonmetals, while nonmetallic elements tend to form covalent compounds with other nonmetals.