3) BONDING, STRUCTURE & PROPERTIES Flashcards

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1
Q

How do you know when a bond is covalent

A

Difference in electronegativities

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2
Q

How do you know when a bond is polar

A

Difference in electronegativities between and including 0.5 and 1.5

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3
Q

How do you know when a bond is ionic

A

Differnce in electronegativities > 1.5

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4
Q

What is pure covalent

A

The bonding atoms have the same electronegativities so share electrons equally

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5
Q

Name the bonding, structure and properties of a monatomic atom

A

Bonding:

None
(Actually have LDF’s)

Structure:

Monatomic
(Separate atoms)

Properties:

  • Non conductors as no charged particles
  • Very low MP and BP as you are only breaking weak LDF’s l
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6
Q

Name the bonding, structure and properties of a covalent molecule

A

Bonding:
Covalent

Structure:
Molecular

Properties:

  • non conductor as no charged particles
  • low MP and BP as only separating weak LDF’s between molecules
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7
Q

Name the bonding, structure and properties of a a giant covalent network

A

Bonding:
Covalent

Structure:
Giant network

Properties:

  • Non conductor as no charged particles
  • very higher MP & BP as millions of strong covalent bonds to break

Only carbon in the form of graphite can conduct because of it has charged free moving particles

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8
Q

Name the bonding, structure and properties of an ionic lattice

A

Bonding:
Ionic

Structure:
Giant lattice

Properties:
•Conducts as liquid(molten) or in solution(dissolved)
This is because + and - ions are free to move around when in liquid or solution

•High MP & BP as millions of strong ionic bonds to break

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9
Q

Name the bonding, structure and properties of a metallic lattice

A

Bonding:
Metallic

Structure:
Giant lattice

Properties:
•conducts as liquid or solid (not solution cannot dissolve)
This is because the electrons are delocalised

•high MP and BP as there are million of strong bonds to break

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10
Q

What are intermolecular forces and name the types

A

The forces of attraction between molecules molecules

  • LDF’s
  • Permanent-dipole to Permanent-dipole
  • ‘hydrogen
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11
Q

What a causes LDF’s

A

Uneven distribution of electrons within an molecules

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12
Q

What type of bonding is present in:

Lithium
Sodium
Potassium
Beryllium
Magnesium 
Calcium
A

Metallic bonding

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13
Q

What type of bonding is present in:

Boron
Carbon
Silicon

A

Covalent network

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14
Q

What type of bonding is present in:

Phosphorus
Sulphur

A

Covalent solids

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15
Q

What type of bonding is present in:

Nitrogen
Oxygen
Hydrogen
Fluorine
Chlorine
A

(Covalent gases)

Diatomic molecules

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16
Q

What type of bonding is present in:

Helium
Neon
Argon

A

Monatomic elements