Bonding Flashcards
(12 cards)
What is ionic bonding?
Bonds between positive and negative ions so both can have full outer shells
What type of force of attraction is ionic bonding
Electrostatic
What are some properties of ionic compounds?
-giant structures of ions
-held together by strong electrostatic forces of attraction
-high melting points
-don’t conduct electricity when solid
-can conduct if molten
What is metallic bonding?
The attraction between the positive ions and delocalised egativley charged electrons (in a lattice structure)
What are properties of metallic bomding?
Very strong material
High melting/boiling points
Good thermal and electrical conduction
Can be bent and shaped
What is an alloy
A mixture of metals and/or one other element
What is a covalent bond?
Shared pair of electrons between atoms. They occur in non metallic elements or compounds of non metals
What are some properties of diamond
-Giant lattice structure
-Each carbon atom covalently bonds to 4 other atoms (very strong)
-Hard substance with high melting point
-no charged particles so no electricity
What are some properties of graphite?
Giant covalent structure
Each carbon atom bonds to 3 others
Layered hexagonal structure
Delocalised electrons allow it to conduct
What is a fullerene?
Carbon atom structures with hexagonal rings of carbon molecules
What was the first fullernene discovered?
Buckminsterfullerene / C60
How big are nano particles
Between 1x10-9 m and 1x10-7m
