Shares one pair of electrons in a single covalent bond. They are strong bonds and the substances may be small molecules, very large molecules or giant covalent structures.
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Give an example of a giant covalent structure
Diamonds and silicon dioxide
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Give an example of a very large molecules
Polymers, and are represented where "n"= a very large number
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What are the limitations of a covalent bonding dot and cross diagram
It doesn't show the bond or the structure of the molecules
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What is Metallic Bonding?
Built up layer upon layer I regular patterns. They are giant structures. The electrons in the outer shell of metal atoms are delocalised and free to move throughout the structure.
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What do Ionic Compounds have?
Regular structures called giant ionic lattices
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Ionic compounds have high melting and boiling points
Ionic compounds conduct electricity when molten or dissolved in water
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What do Covalent molecules have?
Weak forces between each molecule
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Covalent molecules have low melting and boiling points
Covalent molecules DO NOT conduct electricity
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Polymers form long chains with strong covalent bonds
Polymers are solid at room temperature
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What are giant covalent structures linked by?
Strong covalent bonds
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The bonds in a giant covalent bond must be broken for a solid to melt or boil
Giant covalent bonds have very high melting or boiling points
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Other cards in this set
Card 2
Front
Diamonds and silicon dioxide
Back
Give an example of a giant covalent structure
Card 3
Front
Polymers, and are represented where "n"= a very large number
Back
Card 4
Front
It doesn't show the bond or the structure of the molecules
Back
Card 5
Front
Built up layer upon layer I regular patterns. They are giant structures. The electrons in the outer shell of metal atoms are delocalised and free to move throughout the structure.
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