Periodic trends in BP and structure

Cards (10)

What are some properties of metals?
Strong, high BP and MP usually, conduct heat and electricity
What is metallic bonding?
It is the attraction between the positive metal ions and the negative sea of electrons
Why can metallic compounds conduct electricity? 
The electrons are mobile charge carriers meaning they can move throughout a compound and conduct electricity
Are metals soluble?
No
Why do metals have such a high MP and BP?
Lots of energy is required to overcome the strong electrostatic attraction between the cations and electrons, this can result in high bp and mp
What is a giant covalent structure?
it is a large structure of molecules which are covalently bonded together
What are some examples of giant covalent structures?
Diamond, graphite, and silicon dioxide
What are some properties of covalent lattices?
High melting and boiling points, due to the strong covalent bonds, they are insoluble in water
can giant covalent structures conduct electricity?
no, the only exceptions are graphene and graphite which are forms of carbon, this is because graphene has layers which have mobile electrons/ delocalised electrons allowing for the conduction of electricity
What are the trends in melting point across period 2 and 3?
They increase up until the elements form simple molecules rather than giant structures