C2 revision on bondings.

Chemical bonding:

• Mixing and reacting are two very different things. For example, we can mix sand and salt together and separate them easily. 
  • However, when the atoms of two or more elements react, they make a new compound which is different to both of the starting atoms. 
• The alkali metals react easily with the halogens because the alkali metals must lose an electron to gain a full outer shell, and so pass it on to the halogens, which need to must gain one to make a full outer shell. 

Sharing electrons - Covalent bonding 

Transferring electrons - Ionic bonding

Covalent bonding: 

non-metal + non-metal

Giant covalent structures:

Diamond:

•  
  • made of carbon
  • high melting and boiling points…