Waec Model Questions Vol1 2021 Chemistry Question 2

Practice essay / theory question 2 from the 2021 Waec Model Questions Vol1 Chemistry examination. This question covers periodic table, electron configuration, periodic trends, chemical bonding .

Waec Model Questions Vol1 2021 Chemistry Essay / Theory
Topics: periodic table electron configuration periodic trends chemical bonding
Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • essay
Waec Model Questions Vol1 2021 Chemistry Question 2 diagram

The diagram shows a portion of the periodic table containing the elements with atomic numbers 11 to 20, together with their group numbers, periods and Pauling electronegativity values.

Question Parts

( a )
Identify the element whose electron configuration is [Ar] 4s². State its group number and the oxidation state(s) it most commonly exhibits in its compounds.
( b )
Using the periodic trends illustrated in the diagram, explain why the atomic radius of potassium (K) is larger than that of calcium (Ca).
( c )
Predict the type of bond formed between aluminium (Al) and chlorine (Cl) and justify your answer with the electronegativity values given in the diagram.

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About This Question

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

The question covers periodic table, electron configuration, periodic trends, chemical bonding .

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