1.16 Transition metals
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Which property is typical of transition metals but not of Group 1 metals?
Choose one answer.
Correct Not quite: the answer is Form coloured compounds
Mark scheme
B
Model answer
B: transition metals often form coloured compounds; Group 1 compounds are white.
Give two differences between the physical properties of transition metals and Group 1 metals.
Mark scheme
any two from:
- transition metals have higher melting points (1)
- transition metals have higher densities (1)
- transition metals are harder / stronger (1)
Model answer
Transition metals have much higher melting points and densities than Group 1 metals, and they are harder and stronger.
Iron forms two oxides, FeO and Fe2O3. Oxide ions have a 2− charge.
Use these formulae to describe a typical property of transition metals.
Mark scheme
- iron ions have different charges in the two oxides (1)
- 2+ in FeO and 3+ in Fe2O3 (1)
Model answer
Transition metals can form ions with different charges: iron is 2+ in FeO and 3+ in Fe2O3.
Name the transition metal used as a catalyst in the Haber process and explain why a catalyst is used.
Mark scheme
- iron (1)
- speeds up the reaction without being used up (1)
Model answer
Iron is used; it speeds up the reaction without being used up.
A student has two solutions. One is blue and one is colourless. One contains copper(II) sulfate and the other sodium sulfate.
Identify the copper(II) sulfate solution and explain your answer.
Mark scheme
- the blue solution (1)
- copper is a transition metal and its compounds are coloured; sodium (Group 1) compounds are white / colourless (1)
Model answer
The blue solution is copper(II) sulfate, because transition metal compounds are coloured, whereas Group 1 compounds such as sodium sulfate give colourless solutions.
State where the transition metals are found in the periodic table.
Mark scheme
- in the central block, between Group 2 and Group 3 (1)
Model answer
They are in the central block, between Group 2 and Group 3.
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