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Atoms and reactions

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Question 30
95%

Which atom is not an isotope of selenium?

Number of neutronsMass number
A4478
B4578
C4680
D4377
A

A

B

B

C

C

D

D

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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