Objective: Classify elements into metal, nonmetal, & metalloids according to their properties. BIG IDEAS Metals are good conductors of heat and electricity. They are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid). Nonmetals are (usually) poor conductors of heat and electricity. They are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. I. > The metalloids are intermediate in their properties. They are shiny like metals but brittle like nonmetals. Metalloids typically conduct heat and electricity better than nonmetals but not as well as metals. Direction: Study the table below showing the results of an experiment and answer the following question. Carbon Rod Sulfur Rock Copper Wire Lead Properties observe Has luster or dull Electrical conductor or non-conductor Heat conductor or non- conductor Malleable or dull Semi-conductor Semi-conductor brittle dull Non-conductor Non-conductor brittle 2. I am bad conductor of electricity. 3. You will mostly find me in solid form at room temperature. 4. I am shiny like a metal, but I am brittle like non-metals. Has luster conductor 5. You will mostly find me in gaseous form at room temperature. 6. I am good conductor of electricity. 7. I never shine when I am polished. conductor II. Direction: Label the following sentences as METAL, NON-METAL, and METALLOIDS. 1. Ishine when I am polished. 8. Gold, Silver, Copper are my examples. 9. Boron, Silicon, Antimony are my examples. 10. Hydrogen, Helium, Carbon are my examples. malleable brittle Questions: 1. Based on the properties observed, which elements are metals? Non-metals? And metalloids? 2. What are the properties of metals? Non-metals? Metalloids? Has luster conductor conductor malleable Prepared by: Danilo M. Abaya - Teacher I, Science Dept.​