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IB Chemistry SL 2.1 The Ionic Model Questions

Practise IB Chemistry SL 2.1 with evidence-led questions on particulate models, bonding, structure and material properties.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Predict ion formation and electron configurations from an atom’s position and valence electrons.
  • Construct neutral ionic formulae by balancing the charges of cations and anions.
  • Explain ionic structure and properties using electrostatic attraction, ion size, charge and ion mobility.

Covered syllabus points

2.1.1—Ion formation2.1.2—Ionic bonding2.1.3—Ionic compounds

Learn this topic

Study 2.1 The ionic model conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

[Maximum number: 1]

How many electrons will be gained or lost when the element with electron configuration 1s22s22p31 s^{2} 2 s^{2} 2 p^{3} forms an ionic bond?

A

Two electrons lost

B

Two electrons gained

C

Three electrons lost

D

Three electrons gained

Question 2

[Maximum number: 2]

Iron may be extracted from iron (II) sulfide, FeS.

Iron (II) sulfide, FeS , is ionically bonded.

Describe the bonding in this type of solid.

Question 3

[Maximum number: 3]

Periodic trends enable chemists to predict the behaviour of related compounds.

Na2O\quad \mathrm{Na}_{2} \mathrm{O} and SO3\mathrm{SO}_{3} are two oxides of period 3 elements.

Na2O\quad \mathrm{Na}_{2} \mathrm{O} does not conduct electricity in the solid state but it does when molten. Pure SO3\mathrm{SO}_{3} does not conduct electricity in either the solid or liquid states. Explain these facts.

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