The table shows the type of bonding in a number of elements and compounds.

a. Draw a labelled diagram to show metallic bonding.

b. Explain why magnesium chloride has a high melting point but bromine has a low melting point.

c. Explain why solid sodium conducts electricity but solid sodium chloride does not conduct electricity.

d. i. Draw a dot-and-cross diagram for carbon dioxide.
ii. Describe the shape of the carbon dioxide molecule.
iii. Explain why a carbon dioxide molecule has this shape.

e. Bromine is a liquid at room temperature. Weak van der Waals’ forces hold the bromine molecules together. Describe how van der Waals’ forces arise.

Transcribed Image Text:

Element or compound Type of bonding Fe, Na NaCl, MgCl, metallic ionic Co, Br, covalent within the molecules