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ScotlandChemistryQuick questions

Area 1: Chemical Changes and Structure

Quick questions on Periodic trends: radius, ionisation energy and electronegativity - SQA Higher Chemistry

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Explain why the first ionisation energy increases across period 3 from sodium to argon. [2 marks]
What is q2?
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Account for the increase in covalent radius down Group 7. [2 marks]
What is q3?
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The first two ionisation energies of calcium are 590590 and 1145 kJ mol−11145 \text{ kJ mol}^{-1}. Calculate the energy to convert 0.200 mol0.200 \text{ mol} of Ca(g)Ca(g) into Ca2+(g)Ca^{2+}(g). [2 marks]

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