Neco Model Questions Vol1 2018 Chemistry Question 2

Practice essay / theory question 2 from the 2018 Neco Model Questions Vol1 Chemistry examination. This question covers Periodic Table, Electronic Configuration, Periodic Trends, Oxidation States .

Neco Model Questions Vol1 2018 Chemistry Essay / Theory
Topics: Periodic Table Electronic Configuration Periodic Trends Oxidation States
Question 2 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • essay
Neco Model Questions Vol1 2018 Chemistry Question 2 diagram

The diagram shows a fragment of the periodic table containing the elements Na, Mg, Al, Si, P, S, Cl and Ar together with their electron configurations.

Question Parts

( a )
Identify the element whose electron configuration is [Ne] 3s² 3p⁴. State its group number and at least two of its common oxidation states.
( b )
Using the periodic trends illustrated in the diagram, explain which of the following compounds would have the highest boiling point and why: NaCl, MgO, Al₂O₃, SiO₂.
( c )
The element phosphorus (P) in Group 15 can exhibit oxidation states –3, +3 and +5. Explain why the +5 oxidation state becomes increasingly stable as we move down the group (compare phosphorus with its heavier congener arsenic).

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About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 2. It is one of the essay questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

The question covers Periodic Table, Electronic Configuration, Periodic Trends, Oxidation States .

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