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Learning objective

Explain the trend in reactivity down Group 2.

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Topic

Group 2, the alkaline earth metals

Subtopic

Group 2 trends and reactions

Aqa A Level ChemistryInorganic chemistry

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Quick explanation

Explain the trend in reactivity down Group 2

  • This point belongs to Group 2, the alkaline earth metals, especially Group 2 trends and reactions.
  • You need to be able to explain the trend in reactivity down Group 2.
  • The key ideas to know are reactivity and Group 2.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

reactivityGroup 2

Why it matters

This objective helps connect Group 2 trends and reactions to exam-style questions, flashcards, and revision notes for Group 2, the alkaline earth metals.

Quick student answer

Which of the following statements correctly describes the trend in reactivity of Group 2 metals as you move down the group?

Direct answer

Reactivity increases due to decreasing ionization energy.

Key terms

  • Ionization Energy: The energy required to remove an electron from an atom in the gas phase.
  • Alkaline Earth Metals: The elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.

Common trap

Confusing reactivity with ionization energy: Remember that lower ionization energy means it is easier for the metal to lose electrons, thus increasing reactivity.

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