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IB Chemistry SL 2.1.1 Ion Formation Questions

Use exam questions to predict electron gain or loss, deduce ion charge and configuration, and construct neutral ionic formulae.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Predict whether a metal atom loses electrons or a non-metal atom gains electrons to reach a stable outer configuration, stating the number transferred.
  • Deduce an ion charge and electron configuration from the element configuration or from the ions in an ionic species.
  • Balance cation and anion charges to write the neutral formula of an ionic compound with correct subscripts.

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Study 2.1.1—Ion formation conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 2.1.1 Ion Formation Questions 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

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