Coaching Centre
Chapter 2: The Periodic Table Notes
How the periodic table was built, how to read it, metals, non-metals and metalloids, why elements in a group behave alike, ions and ionic compounds, covalent molecules, and which substances conduct electricity.
Sections
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2A History of the periodic table Mastered
How chemists from Lavoisier to Mendeleev, Moseley and Seaborg sorted the elements, how gaps in Mendeleev's table predicted new elements, and how the table was finished in 2016.
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2B Navigating the periodic table Mastered
How to read the periodic table: atomic number order, what each box shows, groups and periods, the link between position and electron arrangement, the main regions and families, and where element names come from.
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2C Metals, non-metals and metalloids Mastered
Properties of metals, non-metals and metalloids; the alkali metals, alkaline earth metals, transition metals, halogens and noble gases; reactivity trends down a group; and an experiment comparing metals in acid.
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2D Electrons, reactivity and ions Mastered
Why elements in a group behave alike, why reactivity changes down a group, how atoms lose or gain electrons to form positive and negative ions, how to predict and write ion charges, and how to name ions.
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2E Ionic compounds Mastered
How ionic bonds hold a crystal lattice together, why ionic compounds are hard, brittle and have high melting points, how to write ionic formulas by balancing charges, polyatomic ions, and how to name ionic compounds.
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2F Covalent molecules Mastered
How non-metal atoms share electrons in covalent bonds, single, double and triple bonds, dot-and-cross and structural diagrams, properties of covalent molecular substances, covalent networks such as diamond and graphite, and naming molecular compounds.
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2G Bonding, structure and electricity Mastered
Why some substances conduct electricity and others don't, metallic bonding and the properties of metals and alloys, conduction in molten and dissolved ionic compounds, and a comparison of ionic, covalent and metallic substances.
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2H The periodic table review Mastered
A summary of the whole Periodic Table chapter, key words, and a mixed test covering the history and layout of the table, metals and non-metals, group trends, ions, ionic and covalent bonding, and conductivity.