CourseCourseConceptConcept

CAIE IGCSE Chemistry 2.2.6 Periodic Table Shell Rules a Group Questions

Connect electron shells with the Periodic Table in CAIE IGCSE Chemistry, using outer electrons, occupied shells and full outer shells to identify an atom's position.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • Use outer-shell electron counts to assign Groups I to VII, or predict the count from a supplied group.
  • Use the number of occupied electron shells to determine the period, or infer the shell count from the period.
  • Identify Group VIII noble-gas atoms by their full outer electron shells.
  • Compare configurations to distinguish equal outer-electron counts within a group from equal occupied-shell counts within a period.

CAIE IGCSE Chemistry 2.2.6 Periodic Table Shell Rules a Group Questions question 1

[Maximum number: 1]

The electronic configurations of two elements are given.
element L: 2,8,8,1
element M: 2,8,4

Which row identifies the group number and the period number for element L and element M ?

group number

period number

group number

period number

I

4

IV

3

I

4

III

4

IV

1

III

4

IV

1

IV

3

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