CourseCourseConceptConceptDocsDocuments

CAIE A-Level Chemistry AS 1.3.4 Electronic Configurations to Include Questions

Practise writing and interpreting electron configurations by counting electrons in shells and subshells, arranging orbital electrons, and identifying paired or unpaired electrons.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Describe electron configurations using shell, subshell and orbital notation, including electron counts, pairing and unpaired electrons.

CAIE A-Level Chemistry AS 1.3.4 Electronic Configurations to Include Questions question 1

[Maximum number: 1]

HCN has been detected in interstellar gas. The molecules below have also been detected in interstellar gas.

Which molecule contains the same total number of valence shell (outer shell) electrons as HCN ?

A

HNO

B

NH3\mathrm{NH}_{3}

C

NO

D

PN

All question bank results loaded