Chapter 19

1. Chapter 19 Elements & Their Properties Meet the Elements

2. Metals • Metals are solid at room temperature, shiny, conduct electricity, malleable, and ductile. • Malleable—bendable; can be hammered into sheets. • Ductile—can be drawn into wires.

4. Types of Metals • Alkali metals are softer than most metals and are very reactive. (Alkali Demo) • Alkaline earth metals are used in fireworks and are found in your body. • Transition metals are used in pigments, some are magnetic, and some are very good conductors of electricity.

5. Nonmetals • Nonmetals are usually gases or brittle solids or powders at room temperature. • They are poor conductors of electricity. • Halogens are very reactive and are used in lights and household items such as toothpaste and bleach. • Noble gases are unreactive (8 outer electrons) and are used in lights, blimps, and balloons.

6. Metalloids & Synthetic Elements • Metalloids conduct electricity better than nonmetals, but not as well as metals. • Synthetic elements do not occur naturally (they are man-made) • All elements with an atomic number higher than uranium (92) were made by scientists and most are radioactive.

7. Element Media • 118 Elements in 10 min • Element Music Video • Rapping the Elements

8. Element Projects