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CAIE IGCSE Chemistry 8.1.4 Similarities in the chemical

CAIE IGCSE Chemistry 8.1.4 Similarities in the chemical
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise explaining why elements in the same group react similarly by comparing their outer-shell electron arrangements.

How this is tested

  • explain similar chemical properties by the same number of outer-shell electrons
  • compare same-group atoms by outer electrons while distinguishing different shell numbers
  • use electron transfer to justify whether an element behaves as a metal or non-metal

Question 22

[Maximum number: 1]

Which statement explains why sulfur, S , has similar chemical properties to selenium, Se?

A

They both have the same number of electrons in their outer electron shell.

B

They are both solids at room temperature and pressure.

C

They are both non-metals.

D

They both form negative ions.