GCSE AQA C2 Covalent Substances: Two Kinds

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Substances with Covalent Bonds can either be ________ _________ or __________ __________.
Simple Molecules or Giant Structures
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In Simple Molecular Substances the Atoms form ____ _____ covalent bonds to form small Molecules of several Atoms.
Very Strong
2 of 21
The forces of attraction between these Molecules are very _____.
Weak
3 of 21
It is because of these weak Intermolecular forces that these Substances have very low _________ and _________ _______.
Melting and Boiling Points
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When Simple Molecular Substances melt or boil the _________________ _______ are broken and not the stronger Covalent Bonds.
Intermolecular Forces
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Most Simple Molecular Substances are are _______ or ________ at room temperature.
Gases or Liquids
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Simple Molecular Substances don't _________ __________.
Conduct Electricity
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Giant Covalent Structures are similar to Giant Ionic Structures (lattices) except that there are no __________ _____.
Charged Ions
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All the atoms are bonded to each other by ______ __________ ______.
Strong Covalent Bonds
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This means that Giant Covalent Structures have very high _________ and _________ _______.
Melting and Boiling Points
10 of 21
Giant Covalent Structures Don't _______ ________ - not even when molten (except Graphite)
Conduct Electricity
11 of 21
In Diamond each Carbon Atom forms 4 Covalent Bonds in a very ______ Giant Covalent Structure.
Rigid
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This Structure makes Diamond the ________ natural substance.
Hardest
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Silicon Dioxide (sometimes called Silica) is what ____ is made from.
Sand
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Each grain of Sand is 1 Giant Structure of Silicon and _________.
Oxygen
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In Graphite, each Carbon atom only forms _ Covalent Bonds.
3
16 of 21
This creates layers which are free to _____ over one another.
Slide
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This sliding is what makes Graphite ____ and slippery.
Soft
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Weak ______________ forces between layers mean Graphite can come off in layers - that's how a pencil works.
Intermolecular
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Graphite is the only Non-Metal which is a good __________ of _____ and _______________.
Conductor of Heat and Electricity
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Each Carbon atom has one _________(free) electron which allows Graphite to conduct Heat and Electricity.
Delocalised
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Other cards in this set

Card 2

Front

In Simple Molecular Substances the Atoms form ____ _____ covalent bonds to form small Molecules of several Atoms.

Back

Very Strong

Card 3

Front

The forces of attraction between these Molecules are very _____.

Back

Preview of the front of card 3

Card 4

Front

It is because of these weak Intermolecular forces that these Substances have very low _________ and _________ _______.

Back

Preview of the front of card 4

Card 5

Front

When Simple Molecular Substances melt or boil the _________________ _______ are broken and not the stronger Covalent Bonds.

Back

Preview of the front of card 5
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