Electronic configuration — KCSE Chemistry
KCSE Chemistry · 54 practice questions · 4 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Write the electronic configuration of elements using shells and sub-shells (s, p, d notation up to Z=20)
Relate the electronic configuration of an element to its position in the periodic table
Use electronic configuration to explain the chemical properties and valency of elements
Electronic configuration
Sample Questions
Try 3 questions free. Sign up to access all 54 questions with full marking schemes.
Identify the electronic configuration of Oxygen (Z = 8) and discuss how this configuration determines its group placement in the periodic table. (4 marks)
View Marking Scheme
Identify the electronic configuration of the following element and explain how it relates to its position in the periodic table: Lithium (Z = 3). (3 marks)
View Marking Scheme
List the electronic configurations of the following elements: (a) Lithium (Z = 3) (b) Beryllium (Z = 4) (c) Oxygen (Z = 8). (3 marks)
View Marking Scheme
Write the electronic configuration of the following elements using shell and sub-shell notation: (a) Nitrogen (Z = 7) (b) Magnesium (Z = 12) (c) Fluorine (Z = 9) (d) Neon (Z = 10). (4 marks)
Why Practise Electronic configuration?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
Detailed Marking Schemes
Every answer shows exactly what examiners award marks for.
Track Your Mastery
See your score improve as you practise and identify remaining gaps.