Chapter 7- Lesson 2 NotesFor periods 1,3,5,7- the notes go on pg 40 and 42. Students should have 3

questions for each note page. Vocabulary for lesson 2 should be on pg 39 with a Bellringer on the Golden Gate Bridge. The Metals packet should be

completed and stapled to pg 41

For periods 2 and 4- the notes go on pg 38 and 40. Students should have 3 questions for each note page. Vocabulary for lesson 2 should be on pg 37 with

a Bellringer on the Golden Gate Bridge. The Metals packet should be completed and stapled to pg 39

Lesson 2-1• More than three-quarters of the elements on the

periodic table are metals.

• With the exception of hydrogen, all of the elements in groups 1-12 on the periodic table are metals.

• Some of the elements in groups 13-15 are metals.

What is a metal?

Lesson 2-1To be a metal, an element must have certain properties.

What is a metal? (cont.)

Lesson 2-1• A metal is an element that is generally shiny. It is

easily pulled into wires or hammered into thin sheets. A metal is a good conductor of electricity and thermal energy.

• Luster describes the ability of a metal to reflect light.

What is a metal? (cont.)

Lesson 2-1Ductility is the ability to be pulled into thin wires.

What is a metal? (cont.)

ductility

from Latin ductilis, means “may be led or drawn”

Lesson 2-1• Malleability is the ability of a substance to be

hammered or rolled into sheets.

• Gold is so malleable that it can be hammered into thin sheets.

• In general the density, strength, boiling point, and melting point of a metal are greater than those of other elements.

What is a metal? (cont.)

Lesson 2-2• The elements in group 1 are called alkali metals.

• The alkali metals include lithium, sodium, potassium, rubidium, cesium, and francium.

• Alkali metals react quickly with other elements, such as oxygen and in nature, occur only in compounds.

Group 1: Alkali Metals

Lesson 2-2Alkali metals react violently with water. They are also soft enough to be cut with a knife.

Group 1: Alkali Metals (cont.)

Lesson 2-3• The elements in group 2 on the periodic table are

called alkaline earth metals.

• The alkaline earth metals are beryllium, magnesium, calcium, strontium, barium, and radium.

Group 2: Alkaline Earth Metals

Lesson 2-3Pure alkaline earth metals do not occur naturally but instead combine with other elements and form compounds.

Group 2: Alkaline Earth Metals (cont.)

Lesson 2-4Groups 3-12: Transition Elements

The elements in groups 3-12 are called transition elements.

Lesson 2-4Groups 3-12: Transition Elements

(cont.)

• Transition elements are in a block at the center and two rows at the bottom of the periodic table.

• Many colorful materials contain small amounts of transition elements.

Lesson 2-4• All transition elements are metals with higher

melting points, greater strength, and higher densities than the alkali metals and the alkaline earth metals.

• Because of their high densities, strength, and resistance to corrosion, transition elements make good building materials.

Groups 3-12: Transition Elements (cont.)

Lesson 2-4Groups 3-12: Transition Elements

(cont.)

Two rows of transition elements—the lanthanide and actinide series—were removed from the main part of the table so that periods 6 and 7 were not longer than the other periods.

Lesson 2-5Metallic properties include luster, malleability, and electrical conductivity.

Patterns in Properties of Metals