4.1 Ionic & Covalent Bonding

Predict whether phosphorus(V) oxide and sodium oxide conduct electricity in their solid and molten states. Complete the boxes with “yes” or “no”.

State the formula of the compounds formed between the elements below.

i)    Sodium and sulfur:

ii)    Magnesium and phosphorus:

Describe the covalent bond present in a chlorine molecule and how it is formed.

Draw the Lewis (electron dot) structure of chloromethane.

Using section 8 of the data booklet to state which of the following single covalent bonds is the most polar.

Using section 10 of the data booklet, list the following molecules in order of increasing bond length between the carbon atoms.

Using section 11 of the data booklet, list the following molecules in order of decreasing bond strength between the carbon atoms.

CO contains three covalent bonds, one of which is a coordinate bond.

Describe how a coordinate bond arises in CO.

Calcium nitrate contains both covalent and ionic bonds.

State the formula of both ions present and the nature of the force between these ions.

State the formula of the compound that boron forms with chlorine.

Draw the Lewis structure for boron chloride.

Explain why boron trichloride is able to form coordinate (covalent) bonds with other molecules.