Strucutre and bonding

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  • Created by: pladoo
  • Created on: 24-10-19 11:30

Bonding 

Types of bonding

Ionic bonds -  occurs between metal and non-metal atoms

Covalent bonds - occurs between non-metal atoms only.

Metallic bonds - occurs between metal atoms Only 

All bonds involve electrons and all bonding involve changes to the number of electrons in the outer shell of atoms.

Structure types 

Ionic

  • Has a Lattice structure of oppositely charged ions held together by strong electrostatic forces of attraction.
  • Example Sodium chloride  

Simples molecules

  • Individual molecules with weak intermolecular forces between them.
  • water 

Giant covalent Lattice

  • Lattice structure 
  • all the atoms are joined together by covalent bonds

Metals

  • Lattice structure
  • ions surrounded by a sea of electrons

Polymers 

  • Long molecules of repeating units
  • Held together by covalent bonds.

From the atom to ion

  • when a metal tom reacts with a non-metal atom, electrons from the outer shell are transferred
  • Metals atoms lose electrons to become positively charged ions
  • Non-metals atoms gain electrons they become negatively charged ions 

Ionic compound 

  • An ionic compound is  a giant lattice of ions 
  • ionic compounds are held together by strong electrostatic forces/attraction between oppositely charged ions. these forces act in all directions in the

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