Transition Elements (Cambridge (CIE) O Level Chemistry): Theory Questions

The diagram shows part of the structures of sodium bromide and sulfur.

Describe both sodium bromide and sulfur in terms of:

bonding

electrical conductivity

solubility in water

Sulfur is an element.

What is meant by the term element?

A coloured crystal of cobalt(II) chloride is placed at the bottom of a beaker containing water. Colour spreads throughout the water over time. Figure 1 shows the spread of colour after two days.

Figure 1

Cobalt is a transition element. Lithium is a Group I element.

Describe two ways in which the properties of cobalt differ from those of lithium.

This question is concerned with the elements in Period 5, Rb to Xe.

The electron distributions of some of these elements are given in the following list.

i) Identify element C.

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ii) Which element in the list does not form any compounds?

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iii) Which element in the list forms a chloride of the type XCl₂?

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iv) Which two elements would react together to form a compound of the type XY₄?

[1]

Predict two differences in physical properties and two differences in chemical properties between rubidium and the transition metal niobium.