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Chemistry GCSE > Bonding > Flashcards

Bonding Flashcards

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1
Q

Describe metallic bonding

A

Strong electrostatic forces between the metal ion and sea of delocalised electrons.

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2
Q

metallic

A
  • giant metallic lattice
    -strong electrostatic force of attraction between the positive metal ions and delocalised electrons
    -
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3
Q

ionic

A
  • giant ionic lattice

- strong electrostatic force of attractio n between the positive metal ion and negative non-metal ion

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4
Q

covalent

A

-simple molecular
-giant covalent
-

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5
Q

eg of giant covalent

A
  • graphite
  • fullerene
  • silicon dioxide
  • diamond
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6
Q

lattice

A

a large network

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7
Q

molecule

A

2 or more atoms covalently bonded

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8
Q

solid–> gas

A

More energy gained

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9
Q

intermolecular forces

A

They are between simple molecular structures

- overcome them when melting or boiling

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10
Q

electrostatic force of attraction

A

Always between something that is charged .

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11
Q

electrostatic force of attraction

A
  • metallic bonding
  • ionic bonding
  • atom
  • covalent bonding
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12
Q

covalent bonding

A

Electrostatic force of attraction between a shared pair of electrons between two or more non-metals.

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13
Q

conductivity

A

metals- can conduct electricity because they have delocalised electrons which are free to move and carry a charge
ionic- no in solids- no free ions
yes when aqueous and molten –> free ions to carry a charge
covalent- no, no free electrons or ions to carry a charge (except graphite and some fullerenes).

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14
Q

Why is diamond hard and high mp+bp ?

A

It is a giant covalent lattice. It has strong covalent bonds which require a lot of energy to break.

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15
Q

Diamond

A

shape- tetrahedral
uses: jewellery, drill tips
cannot conduct electricity because there are no free electrons

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16
Q

Graphite

A
  • layers of graphene- held by weak intermolecular forces- layers can slide
  • hexagonal rings
  • bonding: 3 carbon bonds so can conduct electricity
    -uses: pencils, lubricant
  • ## 1 delocalised electron per atom
17
Q

What happens when writing with pencil?

A

You are transferring each ring onto the paper.

18
Q

silicon dioxide

A
  • structure: tetrahedral
  • Bonding- Si - 4 bonds
  • O- 2 bonds
  • hard, strong
  • uses: make glass (sand)

Chemistry GCSE (14 decks)

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