Properties and Characteristics of Metals: 1. Malleable 2. Ductile 3. Good conductors of electricity and heat. 4. Have luster (metallic luster) Properties shared by Metalloids and Nonmetals: 1. Both metalloids and nonmetals are poor conductors of heat. 2. Metalloids and nonmetals are brittle and not ductile. Properties and Characteristics of Nonmetals: 1. Brittle 2. Non-Ductile 3. Poor conductors of heat and electricity. 4. No luster.