bonding 1 - types and shapes

Question 1

linear

Answer 1

180 degrees
2 bonding pairs repel equally
Around central _ atom there are 2 bonding pairs and 0 lone pairs of electrons

Question 2

trigonal planar

Answer 2

120 degrees
3 bonding pairs repel equally
Around the central ___ atom there are 3 bonding regions and 0 lone pairs of electrons

Question 3

tetrahedral

Answer 3

109.5 degrees
4 bonding pairs repel equally
Around he central ___ atom there are 4 bonding pairs and 0 lone pairs of electrons

Question 4

octahedral

Answer 4

90 degrees
Around the central ___ atom there are 6 bonding pairs and the 0 lone pairs of electrons
6 bonding pairs repel equally

Question 5

pyramidal

Answer 5

107 degrees
The lone pair of electrons repels more than the 3 bonding pairs
Around the central ___ atom there are 3 bonding pairs and the 1 lone pairs of electrons

Question 6

non linear

Answer 6

104.5 degrees
2 lone pairs repel more than the 2 bonding pairs
Around the central ___ atom there are 2 bonding pairs and the 2 lone pairs of electrons

Question 7

Describe what is meant by the term ionic lattice, in terms of the type and arrangement of
particles present

Answer 7

Repeating pattern
of oppositely charged ions

Question 8

ionic bonding

Answer 8

The electrostatic attraction between oppositely charged ions

Question 9

covalent bonding

Answer 9

The strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms

Question 10

metallic bonding

Answer 10

The strong electrostatic attraction of a lattice of positive metal ions to a ‘sea’ of delocalised electrons

Question 11

dative covalent bonding

Answer 11

The strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms where only one of the atoms supplies both of the electrons shared

Question 12

Average Bond Enthalpy

Answer 12

Can be used as a measurement of covalent bond strength

Question 13

describe electron pair repulsion theory

Answer 13

1. electron pairs repel each other to get as far apart as possible
2. lone pairs repel more strongly than bonding pairs
3. shape is determined by the number and type of electron pairs (bond pairs/ lone pairs) around the central atom