Unit 2: Bonding and Compounds

Question 1

Ionic bonds:

Answer 1

These are held together by electrostatic attractions between the ions.
These are made when one atom gives electrons to the other and the cation and anion will attract, making a ionic bond.
1. greater charge polarization between ions increase bond strength.
2. the smaller the ion (better electronegativity), the better the bond strength is.

In ionic liquids, the actual ions are more free to move around than solids.

Question 2

Metallic bonds:

Answer 2

The valence electrons in these bonds are very mobile, which is why they are good conductors of electricity. Their delocalized structure also is good for malleability and ductility.

Metals can bond with others to make alloys. There are 2 types:

1. interstitial alloy, where atoms with very different atomic radii combine.
2. substitutional alloy, atoms with similar radii.

Question 3

Molecular covalent bonding

Answer 3

you know covalent bonds

The first covalent bond between 2 atoms is called a sigma bond. ALL single bonds are called sigma bonds.

For more check graph on pg 94

Question 4

Internuclear distance: