Igcse Model Questions Vol1 2023 Chemistry Question 2

Practice practical question 2 from the 2023 Igcse Model Questions Vol1 Chemistry examination. This question covers Periodic Table .

Igcse Model Questions Vol1 2023 Chemistry Practical

Topic: Periodic Table

Question 2 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • practical

Three unknown solid salts (labelled Sample 1, Sample 2 and Sample 3) are subjected to a flame test using a clean platinum wire. The observed flame colours are recorded as follows: Sample 1 – bright yellow flame Sample 2 – lilac (pale violet) flame Sample 3 – deep red flame

Question Parts

( a )

Identify the metal cation present in each sample by matching the observed flame colour with the standard flame‑test colours given below: Na⁺ – yellow K⁺ – lilac Rb⁺ – deep red State the metal name and its chemical symbol for each sample.

( b )

Write the ground‑state electron configuration for each identified metal ion (use the noble‑gas shorthand).

( c )

Explain, using periodic trends, why the flame colour changes from yellow (Na⁺) to lilac (K⁺) to deep red (Rb⁺) as you move down Group 1.

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About This Question

This is Igcse Model Questions Vol1 2023 Chemistry Question 2. It is one of the practical questions from the 2023 Igcse Model Questions Vol1 Chemistry examination.

The question covers Periodic Table .

View More Igcse Model Questions Vol1 2023 Chemistry Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

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