© Copyright Pearson Prentice Hall Slide 1 of Classifying the Elements A coin may contain much information in a small space— its value, the year it was minted, and its country of origin. Each square in a periodic table also contains information. You will learn what types of information are usually listed in a periodic table.

Slide 2 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Squares in the Periodic Table The periodic table displays the symbols and names of the elements, along with information about the structure of their atoms. 6.2

Slide 3 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Squares in the Periodic Table The Group 1A elements are called alkali metals. The Group 2A elements are called alkaline earth metals. The nonmetals of Group 7A are called halogens. 6.2

Slide 4 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Squares in the Periodic Table 6.2

© Copyright Pearson Prentice Hall Classifying the Elements > Slide 5 of 28 Electron Configurations in Groups How can elements be classified based on their electron configurations? 6.2

Slide 6 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Electron Configurations in Groups Elements can be sorted into noble gases, representative elements, transition metals, or inner transition metals based on their electron configurations. 6.2

Slide 7 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Electron Configurations in Groups The Noble Gases The noble gases are the elements in Group 8A of the periodic table. The electron configurations for the first four noble gases in Group 8A are listed below. 6.2

Slide 8 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Electron Configurations in Groups The Representative Elements Elements in groups 1A through 7A are often referred to as representative elements because they display a wide range of physical and chemical properties. The group number equals the number of electrons in the highest occupied (valence) energy level. 6.2

Slide 9 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Electron Configurations in Groups In atoms of the Group 1A elements below, there is only one electron in the highest occupied energy level. 6.2

Slide 10 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Electron Configurations in Groups In atoms of the Group 4A elements below, there are four electrons in the highest occupied energy level. 6.2

Slide 11 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Transition Elements In atoms of a transition metal, the highest occupied s sublevel and a nearby d sublevel contain electrons. In atoms of an inner transition metal, the highest occupied s sublevel and a nearby f sublevel generally contain electrons. 6.2

Slide 12 of 28 © Copyright Pearson Prentice Hall Classifying the Elements > Transition Elements Blocks of Elements 6.2

© Copyright Pearson Prentice Hall Slide 13 of 28

© Copyright Pearson Prentice Hall Slide 14 of 28 Section Quiz -or- Continue to: Launch: Assess students’ understanding of the concepts in Section Section Assessment 6.2.

© Copyright Pearson Prentice Hall Slide 15 of Section Quiz 1. Which of the following information about elements is usually NOT included in a periodic table? a.color b.symbol c.atomic number d.atomic mass

© Copyright Pearson Prentice Hall Slide 16 of Section Quiz 2. An alkali metal would have in the highest occupied energy level a.an s 2 electron. b.an s 1 electron. c.p 2 electrons. d.p 6 electrons.

© Copyright Pearson Prentice Hall Slide 17 of Which one of the following is incorrectly labeled? a.Ne, noble gas b.Cu, transition metal c.Ga, transition metal d.Cl, halogen 6.2 Section Quiz

© Copyright Pearson Prentice Hall Slide 18 of Section Quiz 4. Transition metals are characterized as being different than representative elements because they have electrons in which suborbitals? a. p b. d c. s d. f

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