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2.2 The periodic table

2.2 The periodic table

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Question 39

Argon has a relative atomic mass of 39.9539.9539.95 and potassium has a relative atomic mass of 39.1039.1039.10. Despite this, potassium is positioned after argon in the modern periodic table.

State why potassium is placed after argon in the periodic table.

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2.2 The periodic table Questions

  1. GCSE
  2. /Chemistry
  3. /2.2 The periodic table

80 exam-style questions on Edexcel GCSE Chemistry 2.2 The periodic table, covering 2.2.1 Mendeleev's periodic table, 2.2.2 Periods, groups, metals and non-metals, and 2.2.3 Electronic configuration and position in the periodic table. Each one has a worked solution and a mark scheme showing where the marks go.

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