The Periodic Table Our Planet : 1.3.2 Obtaining Resources 09/05/2018 The Periodic Table WJEC GCSE Applied Science Our Planet : 1.3.2 Obtaining Resources

Lesson Objectives By the end of this lesson you should: 09/05/2018 By the end of this lesson you should: Understand the arrangement of elements in the Periodic Table Be able to make predictions about some elements based on trends in their data

Horizontal rows are called PERIODS Periodic table 09/05/2018 Mendeleev Hello. My name’s Dimitri Mendeleev. In the 19th century I arranged all the known elements into a pattern according to their properties. This pattern is called “The Periodic Table” Vertical columns are called GROUPS Horizontal rows are called PERIODS

Periodic table Mendeleev 09/05/2018 Mendeleev Hello. My name’s Dimitri Mendeleev. In the 19th century I arranged all the known elements into a pattern according to their properties. This pattern is called “The Periodic Table” 1 2 3 4 5 6 7

The Periodic Table 09/05/2018 Fact 1: Elements in the same group have the same number of electrons in the outer shell H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Fe Ni Cu Zn Br Kr Ag I Xe Pt Au Hg These elements have __ electrons in their outer shells These elements have __ electrons in their outer shell E.g. all group 1 metals have __ electron in their outer shell

Fact 2: As you move down through the periods an extra shell is added: The Periodic Table 09/05/2018 Fact 2: As you move down through the periods an extra shell is added: E.g. Lithium has 3 electron in the configuration 2,1 H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Fe Ni Cu Zn Br Kr Ag I Xe Pt Au Hg Sodium has 11 electrons in the configuration 2,8,1 Potassium has 19 electrons in the configuration __,__,__

Fact 3: Most of the elements are metals: The Periodic Table 09/05/2018 Fact 3: Most of the elements are metals: These elements are metals H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Fe Ni Cu Zn Br Kr Ag I Xe Pt Au Hg These elements are non-metals This line divides metals from non-metals

The Periodic Table 09/05/2018 Fact 4: (Most important) All of the elements in the same group have similar CHEMICAL PROPERTIES. H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Fe Ni Cu Zn Br Kr Ag I Xe Pt Au Hg E.g. consider the group 1 metals. They all: Are soft Can be easily cut with a knife React with water

The Periodic Table Noble gases Alkali metals Halogens 09/05/2018 Noble gases Alkali metals Halogens These elements are metals H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Fe Ni Cu Zn Br Kr Ag I Xe Pt Au Hg This line divides metals from non-metals These elements are non-metals