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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
Recommended