1. Solid
2. High mp and bp
3. Does not conduct electricity when solid
4. Does conduct when dissolved in water
5. Soluble in water (salt)
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physical properties of molecular covalent
1. Low mp and bp
2. Does not conduct electricity
3. Insoluble in water (as mc are non-polar)
4. Soluble in non-polar solvents e.g. hexane
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physical properties of giant covalent diamond
1. Solid
2. Hardest natural substance
3. High mp and bp
4. Does not conduct electricity
5. Insoluble (solvent molecules cannot penetrate diamonds structure)
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physical properties of giant covalent graphite
1. Solid
2. Soft and slippery
3. High mp and bp
4. Conducts electricity when solid
5. Insoluble in all solvents (cannot penetrate graphites structure)
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physical properties of (giant) metallic lattice
1. Solid
2. High mp and bp
3. Hard
4. Malleable and ductile
5. Conducts electricity when solid and liquid
5. High density
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Tips for mp across period 3
Silicon ha a giant covalent structure
and has highest mp in period 3
Argon is monoatomic with weak van Der Waals forces between its atoms which takes little heat to break
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Common mistake
Show lone pairs in hydrogen bonding
7 of 7
Other cards in this set
Card 2
Front
physical properties of molecular covalent
Back
1. Low mp and bp
2. Does not conduct electricity
3. Insoluble in water (as mc are non-polar)
4. Soluble in non-polar solvents e.g. hexane
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