Unit: Chemistry

Lesson 3: Metals

Essential Questions:

1.) What are the properties of metals?

2.) How are metals classified?

MetalsMany of the objects around you contain metals. What are the objects that will set off the metal detector?

Elements that are good Metals

conductors of electric current

and heat. They tend to be shiny

and bendable.

The majority of elements in the periodic table are metals.

Physical PropertiesShininess and Lusterreflectivity

Ability to be rolled into Malleableflat sheets or shapes

Ability to be drawn into Ductilelong wires

Ability of an object Thermal conductivityto transfer heat

Ability of an object Electrical conductivityto carry electriccurrent

Chemical Properties

The ease and speed Reactivity

in which an element

combines or reacts

with another substance

Sodium reacts strongly with water.

The deterioration of Corrosion

metal due to a

chemical reaction

When iron gates react with oxygen in the air they form rust.

How are metals classified?Alkali Metals Group 1 The most reactive Found only in

compounds Melt at low

temperaturesElements such as lithium, copper, and potassium give fireworks their colors.

Alkali Metals

Alkaline Earth Metals Group 2 Harder and denser Melt at higher temperatures Not as reactive

Calcium compounds are an essential part of teeth and bones.

Alkaline Earth Metals

Transition Metals Groups 3-12 Good conductors of heat and electric

current Malleable Less reactive than metals

The gold film on an astronaut's visor protects from the sun.

Transition Metals

Metals in Mixed Groups Only some elements in Groups 13-16

are metals.

Aluminum

Lead

Mixed Metals

Lanthanides and Actinides Found in the two rows below the main

table. Row 1- Lanthanides (used to make

laser lights) Row 2- Actinides (many are made in

labs)

Lanthanides are used to produce laser lights in range finders. It uses a laser beam to determine distance.

Lanthanides

Actinides

Transuranium Elements Elements that follow uranium in the

periodic table. Particle accelerators are used to create

these elements.

Particle accelerators are used to make elements.

Transuranium Elements