Edexcel chemistry (A level ) QP 1

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Edexcel chemistry (A level ) QP 1

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Edexcel chemistry (A level ) QP 1

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1 (a) The table shows the melting temperatures of some consecutive elements.

Element Melting temperature / °C

Na 98

Mg 650

Al 660

Si 1410

P 44
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(i) Explain why silicon has a much higher melting temperature than aluminium.

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,(ii) Explain why phosphorus has a much lower melting temperature than silicon

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(b) The figure shows the first ionisation energies of elements with atomic numbers

1 to 18.

(2)

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, (i) Explain why there is a decrease in first ionisation energy from beryllium to
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boron.

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(ii) Explain why there is a decrease in first ionisation energy from nitrogen to
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oxygen.

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Study Level: A/AS Level
Subject: Chemistry 2015
Uploaded on: April 16, 2026
Number of pages: 32
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Only questions

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