Alloy steels are made when iron is alloyed with other transition metals such as cobalt and chromium - Edexcel - GCSE Chemistry - Question 1 - 2018 - Paper 1

To identify the typical properties of a transition metal, we need to review the characteristics that are commonly associated with transition metals.

1. Used as a Catalyst: Many transition metals, like iron, cobalt, and nickel, are known for their catalytic properties. This property allows them to speed up reactions without being consumed in the process.

2. Density: Transition metals generally have high densities compared to other metal groups, reflecting their compact atomic structure.

3. Colour of Metal Chloride: Transition metals typically form coloured compounds, unlike many main group metals that form colourless ones.

From the table, the only row that captures these typical properties is:

• Row C: 'Yes' for being used as a catalyst, 'High' density, and 'Coloured' chloride.