1. Metals, Metalloids, and Nonmetals
Chemistry PowerPoint # 2

2. 3 types of elements
Metals
Metalloids
Nonmetals

3. Metals
Metal – an element that is a good electrical conductor and a good heat conductor.
4 Physical properties of metals
Malleable – can be pounded into shapes
Ductile – can be pulled out into long wires
Metallic luster – silver grey
Hardness – varying hardness

4. What is a good conductor?

5. Malleable
Malleable – ability to be pounded into shapes.

6. Ductile Ductile – ability to be drawn out into a thin wire.

7. Metallic Luster Most metals have a silver/grey luster (or shine)
Gold (Au) and Copper (Cu) – yellow/reddish brown luster

8. Hardness Hardness varies
Some can be cut with a butter knife
Others are VERY hard
Most metals have a high melting point – meaning they are solids at room temp.
Mercury (Hg) is the only exception (liquid)

9. Metal Chemical Properties
Reactivity – ability of an element to undergo a chemical change, heat is released.
Na and K very reactive, quickly react (Group 1)
Au and Cr not very reactive, react slowly
Corrosion – deterioration of metals due to reaction with oxygen (Ex. Rust, tarnish)

10.
Metalloids
Metalloids – elements with some characteristics of metals and others of nonmetals.
All are solid at room temp
Used as semiconductors found in electronics

11. Nonmetals
Nonmetal – a poor conductor of heat and electricity. (Opposite of a metal) Most are gases at room temperature (low boiling point) A few solids (C, I) – very brittle One liquid (Br)