Chemistry- bonding

when chemical reactions take place, chemical bonds are made
1. this happens when an atom either shares or gains electrons
ionic bonding concept
1. gaining elecctrons
  1. if you gain you become negative
    1. if you loose you become positive
covalent bonding
1. strong covalent bonds within the molecules
  1. weak forces of attraction between the molecule
    1. sharing electrons
giant covalent structures
1. diamond
  1. high melting and boiling points
    1. diamonds a form of carbon that has a giant, rigid covalent structure, each carbons make four bonds.
      1. large number of covalent bonds resluts in high boiling/melting points- makes it hard
2. strong covalent bonds between the two carbon atoms
Graphite
1. covalent bonds between 2 carbons
  1. weak intermolecular force
    1. graphite only makes three bonds
      1. layers can easily slide over eachother
Silicon Dioxide
1. strong covalent bonds
  1. salt
    1. very high melting point
Afullerene
1. carbon atoms form fullerenes.
  1. hexagonal rings
    1. covalent bonds
      1. no giant covalent structures
        simple molecules
Giant ionic substances
1. mixture of positive and negative charged ions
  1. high melting points
    1. lot amount of energy to break it
      1. must be dissolved in water for it to conduct
metals
1. giant structure
  1. delocalised electrons surround positive ions
    1. Hold structure allow the atoms to slide over eachother
      1. metals can be shaped or bent

Resource summary

	Created by Victoria Mahon almost 10 years ago