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Year 10 - Chemistry
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Year 10 - Chemistry:
Bonding
Periodic Table
Molecule Shapes
Diagrams
Structure of an atom
Octet Rule
Bonding
Periodic Table
Molecule Shapes
Diagrams
Structure of an atom
Octet Rule
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Outline
Year 10 - Chemistry
Bonding
Ionic
Properties
High melting and boiling points
Good conductor in water (or as a liquid)
Brittle
Cation and anion (metal and non-metal)
Covalent
Properties
Low melting and boiling points
Poor conductor
Forms discrete molecules
Two non-metals
Metallic
Properties
Very high melting and boiling points
Great conductor
Sea of delocalised electrons holds lattice together
All metals
Periodic Table
Trends
As you go across a period add one valence electron
As you go down a group add one valance shell - all elements in the same group will contain similar chemical properties
Molecule Shapes
Linear
Bent
Trigonal Planar
Trigonal Pyramidal
Tetrahedral
VSEPR
The 3D structure of molecules can be determined using electron pair repulsion (VSEPR). Lone pairs repel bonding pairs, this how trigonal pyramidal molecules are formed.
Diagrams
Lewis
Structural
Structure of an atom
Octet Rule
The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.