Gce Model Questions Vol1 2021 Chemistry Question 2

Practice essay / theory question 2 from the 2021 Gce Model Questions Vol1 Chemistry examination. This question covers Periodic Table .

Gce Model Questions Vol1 2021 Chemistry Essay / Theory
Topic: Periodic Table
Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • essay

The illustration shows a portion of the periodic table covering periods 3 and 4 and groups 1 to 8. The element highlighted in the diagram is iron (Fe) with atomic number 26. The following data are given for the three transition metals in period 4: - Manganese (Mn, Z = 25): atomic radius 127 pm, first ionisation energy 717 kJ mol⁻¹, electronegativity 1.55. - Iron (Fe, Z = 26): atomic radius 126 pm, first ionisation energy 762 kJ mol⁻¹, electronegativity 1.83. - Cobalt (Co, Z = 27): atomic radius 125 pm, first ionisation energy 760 kJ mol⁻¹, electronegativity 1.88.

Question Parts

( a )
Explain why the atomic radius decreases from Mn to Co across the period, even though the number of electron shells remains the same.
( b )
Using the ionisation energy data, predict the most common oxidation state of iron in its compounds and justify your answer.
( c )
Write the ground‑state electron configuration of iron and discuss its magnetic behaviour in terms of unpaired electrons.

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About This Question

This is Gce Model Questions Vol1 2021 Chemistry Question 2. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Chemistry examination.

The question covers Periodic Table .

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