Classes of Elements ( Pages 244 – 245). Metals (pink)

Classes of Elements(Pages 244 – 245)

Metals (pink)

Properties

Properties = observations you can make about something.

Example = what are the properties of a football?

Most metals share these properties…

1. Shiny

2. Ductile

3. Good Conductors of Electricity

4. Malleable

5. Good Conductors of Thermal Energy

6. Solid at room temperature

SHINY

You can see your reflection in a mirror because mirrors have a thin layer of silver (Ag) behind the glass.

DUCTILE

Most metals are ductile, which means they can be made into thin wires.

Good CONDUCTORS of electricity

Wires in electrical devices in your home are made of copper.

MALLEABLE

Most metals are malleable, which means they can be flattened into thin sheets or formed into shapes without shattering.

Aluminum (Al) can be flattened into sheets to make foil and cans.

Good CONDUCTORS of thermal energy

Most metals are good at transferring heat.

Iron (Fe) griddles conduct thermal energy from a stove top to cook food.

Most metals are solids at room temperature

Lithium (Li)Zinc (Zn) Nickel (Ni)

Sodium (Na)Gold (Au Calcium (Ca)

Nonmetals (yellow)

Most nonmetals have these properties…

1. Not shiny

2. Not ductile

3. Not good conductors of electricity

4. Not malleable

5. Not good conductors of thermal energy

6. Gases at room temperature

Most nonmetals are gases at room temperature

Neon (Ne)

Helium (He)

Argon (Ar)

Hydrogen (H)Nitrogen (N)

Metalloids (green)

• Metalloids are known as semi-conductors.

• This means that they can conduct electricity depending on their temperature.

• Metalloids share some properties of metals and some properties of non-metals.

Boron (B)Silicon (Si)

Arsenic (As)