1. The Periodic Table Our Planet : 1.3.2 Obtaining Resources
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The Periodic Table
WJEC GCSE Applied Science
Our Planet : Obtaining Resources

2. Lesson Objectives By the end of this lesson you should:
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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

3. Horizontal rows are called PERIODS
Periodic table
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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

4. Periodic table Mendeleev
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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

5. The Periodic Table
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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

6. Fact 2: As you move down through the periods an extra shell is added:
The Periodic Table
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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 __,__,__

7. Fact 3: Most of the elements are metals:
The Periodic Table
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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

8. The Periodic Table
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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

9. The Periodic Table Noble gases Alkali metals Halogens
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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