Neco 2019 Chemistry Question 2

Practice essay / theory question 2 from the 2019 Neco Chemistry examination. This question covers Periodic Table, Group Trends, Atomic Radius, Ionisation Energy, Ions .

Neco 2019 Chemistry Essay / Theory
Topics: Periodic Table Group Trends Atomic Radius Ionisation Energy Ions
Question 2 NECO • 2019 • CHEMISTRY • essay

The illustration presents the complete third period (period 3) of the periodic table, showing the elements Na, Mg, Al, Si, P, S, Cl and Ar with their atomic numbers, group numbers, first ionisation energies (kJ mol⁻¹) and atomic radii (pm).

Question Parts

( a )
State the group number for each of Na, Mg and Al and indicate the general type of element each belongs to (e.g., alkali metal, alkaline‑earth metal, metal).
( b )
Describe the trend in atomic radius from Na to Ar across the period and give a concise explanation for the observed pattern.
( c )
Using the ionisation energies given in the diagram, calculate the ratio of the first ionisation energy of Mg to that of Na. Give your answer to two decimal places.
( d )
When aluminium attains a noble‑gas configuration, what type of ion does it form and what is its symbol with charge?

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About This Question

This is Neco 2019 Chemistry Question 2. It is one of the essay questions from the 2019 Neco Chemistry examination.

The question covers Periodic Table, Group Trends, Atomic Radius, Ionisation Energy, Ions .

View More Neco 2019 Chemistry Questions More Neco Practice Questions Back to Questions

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