Download - S3 Chemistry ( 元素週期表 ). Aim ! Group similar elements together. Easy to find an element in the table
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S3 Chemistry
(元素週期表 )
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Aim !
• Group similar elements together.• Easy to find an element in the table.
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How would you group the elements together ?
• By their states ?????
• Three groups (solids, liquids, gases)
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By their Chemical Properties(特性 )
1. Metals react with water.
-sodium
-potassium
-iron
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• Sodium reacts vigorous(劇烈 ) with water.
• Potassium reacts vigorous with water.
• Iron reacts slowly with water.
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• Therefore, sodium and potassium put into same group(group I).
• Iron puts into another group.
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By their Chemical Properties(特性 )
2.Metals with hydrochloric acid
-Calcium
-Magnesium
-Copper
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• Calcium reacts ___________ with hydrochloric acid.
• Magnesium reacts ____________ with hydrochloric acid.
• Copper has no reaction with hydrochloric acid.
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• Therefore, calcium and magnesium put into same group(group II).
• Copper puts into another group.
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Action of aqueous sulphite solution on aqueous chlorine solution, aqueous bromine, aqueous iodine solution and sulph
ur.
• Aqueous (水溶 )
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Results:
• Chlorine solution, bromine solution and iodine solution turn colourless.
• Sulphur has no reaction.
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• Therefore, chlorine, bromine and iodine put into same group(group VII).
• Sulphur puts into another group
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Periodic Table
Group I Group II Group VI Group 0
Li (2,1) Be (2,2) O (2,6) He (2)
Na (2,8,1) Mg (2,8,2) S (2,8,6) Ne (2,8)
K (2,8,8,1) Ca (2,8,8,2) Se (2,8,18,6) Ar (2,8,8)
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Periodic Table
• Number of outermost shell electrons in an atom
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Periodic Table
• Family names / group names• Alkali metals
• Alkaline earth metals
• Halogens
• Noble gases
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Periodic Table
Period 2 Li (2,1) Be (2,2) B (2,3) C (2,4 )
N (2,5) O (2,6) F (2,7) Ne (2,8)
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Periodic Table
• Number of electron shells in an atom
• Occupied (佔有 )
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Exercise
The atomic number of an element X is 16.
To which group and period does element X
belong ?
A. Group I and Period 3
B. Group III and Period 6
C. Group VI and Period 3
D. Group 0 and Period 2
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Congratulations !
You get the right answer.
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Oh ! Try again !