Igcse Model Questions Vol1 2023 Chemistry Question 1

Practice practical question 1 from the 2023 Igcse Model Questions Vol1 Chemistry examination. This question covers Atomic Structure .

Igcse Model Questions Vol1 2023 Chemistry Practical
Topic: Atomic Structure
Question 1 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • practical

You are given a solid piece of an unknown metal. Using a balance and a graduated cylinder, you determine its mass and its volume by water displacement. Mass of the metal = 2.00 g (to 3 s.f.) Initial water level in the cylinder = 25.00 mL Final water level after immersion = 26.20 mL

Question Parts

( a )
Calculate the density of the metal in g·cm⁻³. Show all steps.
( b )
Using the density you have obtained, identify the metal by comparing with the following known densities (to 2 d.p.): Magnesium – 1.74 g·cm⁻³ Aluminium – 2.70 g·cm⁻³ Lithium – 0.53 g·cm⁻³ Zinc – 7.14 g·cm⁻³ State the name and chemical symbol of the metal.
( c )
For the metal you have identified, use the periodic table values: atomic number = 12, relative atomic mass = 24.31 u. (i) Write the number of protons, neutrons and electrons in a neutral atom of this metal. (ii) Calculate the total number of neutrons present in the 2.00 g sample. Express your answer in scientific notation to two significant figures.

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About This Question

This is Igcse Model Questions Vol1 2023 Chemistry Question 1. It is one of the practical questions from the 2023 Igcse Model Questions Vol1 Chemistry examination.

The question covers Atomic Structure .

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