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Periodicity
3.1 The periodic table
Groups - Periods
Practice
3.2 Physical properties
Electrostatic forces
F=k q1 q
2/r2
Distance of electron from nucleus ( r ) has a larger effect than charge of nucleus (q
1)
and charge of electron (q2)
rr
q
Metals: ionic < atomic radius (shell lost)Non-metals: ionic > atomic radius (e-e repulsion)
Electronegativity - Ion.Energy
r
q
Melting point
Metallic bond V.d.Waals forces
Practice
3.3 Chemical properties
Alkali metals + water
2Li + 2H2O 2LiOH + H
2
- exothermic- alkaline solution- gas/bubbles
Alkali metals + water
Alkali metals + halogens
Halogens + halide ions
Remember Redox: Reactivity series and spontaneity
Reactivity series
Oxides of period 3 + water
Practice
Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18