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chem > 04 Chemical Bonding > Flashcards

04 Chemical Bonding Flashcards

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1
Q

What are chemical bonds ?

A

Electrostatic binding forces of attraction between particles such as atoms, ions or molecules

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2
Q

What are metallic bonds ?

A

Electrostatic forces of attraction between the cation and delocalised electrons

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3
Q

What are ionic bonds ?

A

Electrostatic forces of attraction between the oppositely charged ions

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4
Q

What is lattice energy (LE) ?

A

Energy released when one mole of solid ionic compound is formed from its constituent gaseous ions under stander conditions

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5
Q

What are covalent bonds ?

A

Electrostatic forces of attraction between the shared pairs of electrons and the positively charged nuclei of the two atoms

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6
Q

What are dative / co-ordinate bonds ?

A

Bonds formed where the shared pair of electrons is provided by only one of the bonding atoms

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7
Q

What is bond energy ?

A

The average energy required to break one mole of covalent bonds in a gaseous molecule into its constituent gaseous atoms

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8
Q

What is coordination number ?

A

The number of nearest neighbours in teh lattice structure

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9
Q

Structure and bonding of metals

A

Giant metallic structure

Metal cations are held in fixed position in an orderly arrangement surrounded by a sea of delocalised electrons

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10
Q

Structure and bonding of ionic compounds

A

Giant ionic structure

Ions are held in fixed positions in an orderly arrangement by strong electrostatic forces of attraction

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11
Q

Structure and bonding of covalent compounds

A

Giant molecular structure - atoms held together in an extensive network of covalent bonds

Simple molecular structure - many simple discrete molecules held together by weak intermolecular forces f attraction, covalent bonding within molecule

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12
Q

Shape angle and polarity of 2bp 0lp

A

Linear
180
Non-polar

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13
Q

Shape angle and polarity of 3bp 0lp

A

Trigonal planar
120
Non-polar

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14
Q

Shape angle and polarity of 2bp 1lp

A

Bent
117.5
Polar

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15
Q

Shape angle and polarity of 4bp 0lp

A

Tetrahedral
109.5
Non-polar

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16
Q

Shape angle and polarity of 3bp 1lp

A

Trigonal pyramidal
107
Polar

17
Q

Shape angle and polarity of 2bp 2lp

A

Bent
104.5
Polar

18
Q

Shape angle and polarity of 5bp 0lp

A

Trigonal bipyramidal
120 and 90
Non-polar

19
Q

Shape angle and polarity of 4bp 1lp

A

Polar

20
Q

Shape angle and polarity of 3bp 2bp

A

Polar

21
Q

Shape angle and polarity of 2bp 3lp

A

Linear
180
Non-polar

22
Q

Shape angle and polarity of 6bp 0lp

A

Tetrahedral
90
Non-polar

23
Q

Shape angle and polarity of 5bp 1lp

A

Polar

24
Q

Shape angle and polarity of 4bp 2lp

A

Square planar
90
Non-polar

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