IB Chemistry SL 2.1.1 Ion Formation

Practise predicting the stable ions formed when metals lose electrons and non-metals gain them. Use electron configurations and periodic position to determine charge, write the…

Syllabus
First assessment 2025
Objective
2.1.1
Level
SL

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 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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