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IB Chemistry HL 2.1.1 Ion Formation Question Bank

Practise IB Chemistry HL 2.1.1 by assigning ions from configurations, checking ionic formulae and interpreting ionisation-energy or electron-affinity data.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • predict whether an atom gains or loses electrons to reach a stable outer configuration
  • deduce an ion's charge and electron configuration from its element and compound formula
  • balance cation and anion charges to construct a neutral empirical formula

2.1.1—Ion formation 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.

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