covelant bonding Flashcards

1
Q

covelant bonding is between what

A

non metal + non metal

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2
Q

the bonds

A

the bonds are very very very strong (even stronger than ionic)

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3
Q

properties

A
  • low mpt
  • can’t conduct
  • solubility
    - in water : not much
    - in organic solvents : yes
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4
Q

why is there a low mpt

A

only has to break IMF

IMF are very weak

- don’t need much energy to break 
- low mpt
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5
Q

3 giant covelants

A

graphite
diamond
silicon dioxide

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6
Q

giant covelant structure

A

giant covelant network (like a lattice)

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7
Q

gc - graphite

A
  • layers of c arranged in hexagons
    - each c has formed 3 bonds
    - used 3 of its outer e
    - one e left over
  • this e is delocalised between layers
    • can move
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8
Q

gc - diamond

A
  • forms a pyramid shape (tetrahedron)
  • each c forms 4 bonds
    • no spare e
      • cannot conduct
  • need to break more bonds
  • higher mpt than graphite
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9
Q

melting points of all bonding

A

strongest = covelant
= ionic
= metallic
weakest = imf

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