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IB Chemistry HL 2.1 The Ionic Model Questions

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

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

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 does a lithium atom form the most stable ion?

A

The atom gains a proton to form a positive ion.

B

The atom loses a proton to form a negative ion.

C

The atom loses an electron to form a positive ion.

D

The atom gains an electron to form a negative ion.

Question 2

[Maximum number: 3]

Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

Question (a)

(a)

In addition to magnesium oxide, magnesium forms another compound when burned in air. Suggest the formula of this compound.

[ 1 ]

Question (b)

(b)

Describe the structure and bonding in solid magnesium oxide.

[ 2 ]
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