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CAIE IGCSE Chemistry 2.3.3 Isotopes of the same element have the

CAIE IGCSE Chemistry 2.3.3 Isotopes of the same element have the
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise linking isotope definitions to electron arrangements so you can justify why isotopes react in the same chemical way.

How this is tested

  • explain identical chemical properties by referring to the same electronic configuration
  • distinguish isotope statements about neutrons, protons, mass numbers and outer-shell electrons
  • choose the statement that links same chemical reactions to the same number of outer electrons

Question 6

[Maximum number: 1]

Which statement explains why isotopes of the same element have the same chemical properties?

A

They have different numbers of protons in their nucleus.

B

They have different numbers of neutrons in their nucleus.

C

They have the same electronic configuration.

D

They have the same number of electrons as protons.