Shapes of molecules

Question 1

Electron pair repulsion theory

Answer 1

• Electron pairs around the central atom repel each other as far apart as possible
• The greater the number of electron pairs, the smaller the bond angle
• Lone pairs of electrons repel more strongly than bonded pairs of electrons

Question 2

Linear

Answer 2

180, 2 bonded pairs with no lone pairs

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Question 3

Trigonal planar

Answer 3

120 , three bonded pairs of electrons with no lone pairs

Question 4

Tetrahedral

Answer 4

109.4 , 4 bonded pairs of electrons with no lone pairs

Question 5

Octahedral

Answer 5

90 , 6 bonding pairs of electrons

Question 6

Non-linear

Answer 6

2 bonding pairs lone p,airs

Question 7

Pyramidal

Answer 7

107 , 3 bonding pairs with one lone pair

Question 8

Electronegativity

Answer 8

A measure of attraction of a bonded atom for the pair of electrons in a covalent bond

Question 9

Non polar bond

Answer 9

The bonded electron pair is shared equally between the bonded atoms

Question 10

Polar bond

Answer 10

The bonded electron electron pair is shared unequally between the bonded atoms

Question 11

permanent dipole-dipole

Answer 11

Polar molecules have permanent dipoles, will always have a negatively and positively charged end, they are attracted to each other.

Question 12

London forces

Answer 12

Polar molecules have permanent dipoles, will always have a negatively and positively charged end, they are attracted to each other.