18 The nonmetals have no metallic luster, and do not reflect light.
19 Nonmetallic elements are very brittle, and cannot be rolled into wires or pounded into sheets. Sulfur powder
20 Hydrogen The Group 1 Nonmetal Most of the hydrogen found in the world is found in water.
21 Metalloids are located on the staircase line, dividing metals from non metals.
22 Properties of Metalloids Have a mixture of metallic and nonmetallic properties.Semi-conductors: Can conduct heat and electricity to some extent.
23 Review Questions1. Identify the following as metals, nonmetals, or metalloids using their location on the periodic table.(a) silicon(b) fluorine(c) uranium(d) mercury(e) arsenic(f) iridium
24 2. List three differences in the physical properties between metals and nonmetals. Metals are shiny, malleable and good conductors whereas nonmetals are dull, brittle an insulators.
25 3. You are given a hammer, a battery, a bulb, and wires 3. You are given a hammer, a battery, a bulb, and wires. How could you use these materials to determine if an unknown solid was a metal or a non-metal? Explain (you may also illustrate) how you will test the substance and what results you will look for.