Gce Model Questions Vol1 2017 Chemistry Question 2

Practice essay / theory question 2 from the 2017 Gce Model Questions Vol1 Chemistry examination. This question covers Periodic Table .

Gce Model Questions Vol1 2017 Chemistry Essay / Theory

Topic: Periodic Table

Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • essay

Gce Model Questions Vol1 2017 Chemistry Question 2 diagram

The illustration presents a portion of the periodic table containing elements with atomic numbers 1 to 20. The positions of phosphorus (P, Z = 15) and sulfur (S, Z = 16) are highlighted. Approximate atomic masses are given: Ca = 40.1 u, P = 31.0 u, O = 16.0 u.

Question Parts

( a )

State the period and group numbers for phosphorus as shown in the diagram.

( b )

Write the ground‑state electronic configuration of sulfur.

( c )

Using their positions in the periodic table, compare the chemical reactivity of phosphorus and sulfur, explaining why one is more likely to gain electrons than the other.

( d )

Calculate the percentage by mass of phosphorus in calcium phosphate, Ca₃(PO₄)₂, using the atomic masses provided.

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About This Question

This is Gce Model Questions Vol1 2017 Chemistry Question 2. It is one of the essay questions from the 2017 Gce Model Questions Vol1 Chemistry examination.

The question covers Periodic Table .

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