Bonding (NEW) Flashcards
What are the properties of METALS?
- Conduct electricity
- Conduct heat
- Malleable and ductile
- High melting and boiling points
What are the properties of IONIC COMPOUNDS?
- Conducts electricity ( Only in liquid, ions can move around)
- High melting points and boiling points (strong ELECTROSTATIC force of attraction between oppositely charged ions)
What are the properties of Simple Molecular Covalent Bonds?
- low melting and boiling points (due to weak INTERMOLECULAR forces)
- does not conduct electricity ( no free electrons)
- usually gases or liquids
What are the properties of diamond
- Hard and high melting point
- Does not conduct electricity ( every atom is joined to 4 other carbons covalently, a lot of energy needed to break)
What is graphite made of?
- slippery ( as layers of carbon atoms slide off each other, WEAK INTERMOLECULAR FORCES between layers)
- conducts electricity (one electron from each carbon is delocalised)
- high melting point
Why do metals have a high melting and boiling point?
Metallic bonds are very strong, lots of energy needed to break the bonds
What are the properties of FULLERENES?
- Strong covalent bonds
- Conduct electricity
What are the Properties of CARBON NANOTUBES?
- conduct electricity
- strong
- flexible
What are the uses of Nano-silver?
- Plasters, appliances, surface of kitchen, socks
What are the properties of Nano- silver?
Anti- fungal
Anti Bacterial
Anti viral
What are the uses of Titanium Oxide?
- Used in sunscreen to block out ultraviolet light
- self cleaning windows
Properties of titanium oxide?
- refractive
What are the problems with using Nano Scale particles?
- destroy ecosystems in the sea
- as they are small they can easily pass through our skin and enter our bloodstream
What are thermochromic pigments?
Pigments that change colour at specific temperatures
What are Photochromic pigments?
They change colour when exposed to light
