Learning objective
Explain trends in atomic radius and first ionisation energy down Group 2.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Group 2, the alkaline earth metals
Subtopic
Group 2 trends and reactions
Study support
Understand this objective
Quick explanation
Explain trends in atomic radius and first ionisation energy 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 trends in atomic radius and first ionisation energy down Group 2.
- The key ideas to know are Group 2.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
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 atomic radius as you move down Group 2?
Direct answer
B) Atomic radius increases due to increased number of electron shells.
Key terms
- Atomic radius: The distance from the nucleus of an atom to the outermost electron shell.
- Ionisation energy: The energy required to remove one mole of electrons from one mole of gaseous atoms.
Common trap
Confusing atomic radius with ionic radius: Remember that atomic radius refers to neutral atoms, while ionic radius refers to charged ions.
Related questions
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Flashcard prompts
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Revision tools
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Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Describe reactions of Group 2 metals with oxygen, water and acids.
Group 2 trends and reactions
- Explain the trend in reactivity down Group 2.
Group 2 trends and reactions
- Explain trends in solubility of Group 2 hydroxides and sulfates.
Group 2 trends and reactions
- Explain why barium sulfate can be used in medicine despite barium compounds often being toxic.
Group 2 applications
- Explain uses of magnesium hydroxide and calcium carbonate in neutralising acidity.
Group 2 applications