Edexcel AS Chemistry

Revision Notes

1.5.5 Metallic Bonding

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Metallic Bonding

  • Metal atoms are tightly packed together in lattice structures
  • When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throughout the structure
  • The free-moving electrons are called ‘delocalised electrons’ and they are not bound to their atom
  • When the electrons are delocalised, the metal atoms become positively charged ions
  • The positive charges repel each other and keep the neatly arranged lattice in place
  • There are very strong forces between the positive metal centres and the ‘sea’ of delocalised electrons

new-1-3-chemical-bonding-diagram-to-show-metallic-bonding

The positive metal ions are suspended in a ‘sea’ of delocalised electrons

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Philippa

Author: Philippa

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener.