Topic 2: Bonding, Giant and molecular structures

Question 1

What is coordinative covalent bonding?

Answer 1

When one atom provides both electrons in a bonding pair

Question 2

Electronegativity definition

Answer 2

The power for an atom to attract electron denisty in a covalent bond towards itself.

Question 3

Increase in electronegativity across the period

Answer 3

More protons

Same amount of sheilding

Question 4

Increase of electronegativity up a group

Answer 4

Less sheilding

Smaller radius

Question 5

Types of intermolecular forces (In strength order)

Answer 5

Van der Waals
Dipole- Dipole
Hydrogen bonding

Question 6

Dipole-Dipole forces

Answer 6

Two permanent polar molecules

Polarity puts them together

Question 7

Hydrogen bonding

Answer 7

Example of dipole dipole
Delocalised electrons enhance the negative charge
Only occurs with O, N, F

Question 8

Factors detrmining the shape of a molecule

Answer 8

Number of bonding pairs
Number of electrons on the central atom
Number of lone pairs

Question 9

Order of electronegativity of bonds

Answer 9

Lone- Lone
Lone- Bonding
Bonding-Bonding

Question 10

Number of bonding pairs: 2

Answer 10

Linear 180

Question 11

3 bonding pairs

Answer 11

Trigonal planar 120

Question 12

4 bonding pairs

Answer 12

Tetrahedral 109.5

Question 13

5 bonding pairs

Answer 13

Trigonal bipyramidial 120+90

Question 14

6 bonding pairs

Answer 14

Octahedral 90

Question 15

3 bonding and 1 lone

Answer 15

Pyrimidal 107

Question 16

Bonding pairs 2

Lone pairs 2

Answer 16

V-shaped 104.5

Question 17

4 bonding pairs

2 lone pairs

Answer 17

Square planar 90