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Chapters in this unit
· 1. Structures and bonding
· 2. Structures and properties
· 3. How much?
· 4. Rates of reaction
· 5. Energy and reactions
· 6. Electrolysis
· 7. Acids, alkalis and salts…read more

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1.1 Atomic structure
Type of sub-atomic particle Relative charge Mass
Proton +1 1
Neutron 0 1
Electron -1 Negligible…read more

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1.1 Atomic structure
Columns = groups
Group number = number of electrons in outer shell
Row number = number of shells
Rows = periods…read more

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1.1 Atomic structure
Atomic Mass
number: number:
The The
number of number of
protons in protons
an atom and
neutrons
in an atom…read more

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1.2 Electronic arrangement
Each shell =
different energy level
Shell nearest nucleus =
lowest energy level
Energy needed to
overcome attractive
forces between protons
and electrons…read more

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