Gce Model Questions Vol1 2024 Chemistry Question 2

Practice essay / theory question 2 from the 2024 Gce Model Questions Vol1 Chemistry examination. This question covers periodic table, electron configuration, oxidation states, effective nuclear charge .

Gce Model Questions Vol1 2024 Chemistry Essay / Theory
Topics: periodic table electron configuration oxidation states effective nuclear charge
Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • essay
Gce Model Questions Vol1 2024 Chemistry Question 2 diagram

The diagram shows a neutral atom of the element with atomic number 24. The electron shells are labelled K, L, M and N and the distribution of electrons in each subshell is indicated as follows: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s². The diagram also lists the common oxidation states observed for this element (+2, +3 and +6).

Question Parts

( a )
Write the ground‑state electron configuration of the element in spectroscopic (noble‑gas) notation.
( b )
Explain, with reference to the electron configuration shown, why the element most commonly exhibits a +3 oxidation state rather than the expected +2 or +4 state.
( c )
Using Slater’s rules, calculate the effective nuclear charge (Z_eff) experienced by a 3d electron in the neutral atom. Show all steps.
( d )
Discuss how the calculated Z_eff influences the size of the 3d orbital and the chemical behaviour of the element compared with the other members of its group.

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About This Question

This is Gce Model Questions Vol1 2024 Chemistry Question 2. It is one of the essay questions from the 2024 Gce Model Questions Vol1 Chemistry examination.

The question covers periodic table, electron configuration, oxidation states, effective nuclear charge .

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