2.2 Ionic Compounds 2.2.1 Atomic Ions LO:I understand how ions are formed from neutral atoms.

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Presentation transcript:

2.2 Ionic Compounds Atomic Ions LO:I understand how ions are formed from neutral atoms

Atoms form ions to achieve a stable electron arrangement: Metals form ions LO:I understand how ions are formed from neutral atoms Non-metals form ions Element Atom electron arrangement Ion electron arrangement Ion Symbol sodium bromine aluminium sulphur 2,8,1 2,8,18,7 2,8,3 2,8,6 2,8 2,8,18,8 2,8 2,8,8 Na + Br - Al 3+ S 2- positive negative

2.2.2 Simple Ionic Structures LO:I understand the structure and bonding in an ionic substance

The ionic bond is the attraction between positive and negative ions. An ionic. LO:I understand the structure and bonding in an ionic substance An ionic. As the size of the ions increases the strength of the ionic bond. The structure of sodium chloride can be described as: The ratio of sodium ions to chloride ions is so the formula is. electrostatic network lattice decreases 1:1 NaCl