6.1.9

Ionic and Metallic Bonding

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Giant Structures and Ionic and Metallic Bonding

Compounds with ionic and metallic bonding form giant structures. These structures lead to specific properties of ionic and metallic compounds.

Ionic Compounds

Ionic Compounds

  • Ionic compounds form giant ionic lattice structures.
    • These are held together by strong electrostatic forces (called ionic bonds) between oppositely charged ions.
Properties of ionic compounds

Properties of ionic compounds

  • Giant ionic lattice structures have very high melting and boiling points because lots of energy is required to break ionic bonds.
  • When solid, the ions in a giant ionic lattice are fixed in place.
    • This means that charges cannot flow, so electricity cannot be conducted.
Metallic bonding

Metallic bonding

  • Metals are made of giant structures of regularly arranged atoms.
  • The structure is a regular lattice of positive ions (cations) in a ‘sea’ of delocalised electrons.
Delocalised electrons

Delocalised electrons

  • Delocalised electrons in compounds with metallic bonding are not bound to an atom and are free to move around within the lattice.
  • Delocalisation happens because metal atoms have a small number of electrons in their outer shells.
Metals as conductors

Metals as conductors

  • Metals are good conductors of electricity because their delocalised electrons can carry a charge through the structure.
  • The electrons move from the negative terminal to the positive terminal.
  • The same delocalised electrons can also carry heat energy through the structure.
Jump to other topics
1

States of Matter

2

Elements, Compounds & Mixtures

3

Atomic Structure

4

The Periodic Table

5

Chemical Formulae, Equations & Calculations

6

Bonding

7

Electrolysis

8

Groups of the Periodic Table

9

The Atmosphere

10

Reactivity Series

11

Metal Extraction

12

Acids & Alkalis

13

Chemical Tests

14

Physical Chemistry

15

Organic Chemistry

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