Metallic Bonding

==Electrostatic attraction== - attraction between a positive and negative substance

==Delocalised electrons== - shared among 2 or more atoms in a molecule

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• Electrons in the outer shell of the metal atoms are delocalised
• There is a strong electrostatic attraction between the sea of delocalised, negative electrons and the positive metal ions
• These forces of attraction hold the atoms together

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• The metals can ==conduct electricity== because the delocalised electrons can move
• The electrons can also carry thermal energy, allowing the metals to ==conduct heat==
• Metals can be ==bent and shaped== because the layers of atoms can slide over each other
• Metallic bonds are ==strong== - therefore metals have high melting and boiling points - need lots of energy to be broken

\ ==Alloy== - mixture of metals

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• Alloys are harder than pure metals as the different sizes of atoms distort the layers, making it more difficult for them to slide over each other

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