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2.1 Atomic structure

2.1 Atomic structure

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Question 21

The atomic number of potassium, K, is 19.

One atom of potassium has a mass number of 39.

Give the number of protons, neutrons and electrons in this atom of potassium.

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Markscheme

2.1 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Atomic structure

87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.

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