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Learning objective

Explain melting point trends of Period 3 oxides.

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Topic

Properties of Period 3 elements and their oxides (A-level only)

Subtopic

Period 3 oxides (A-level only)

Aqa A Level ChemistryInorganic chemistry

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Quick explanation

Explain melting point trends of Period 3 oxides

  • This point belongs to Properties of Period 3 elements and their oxides (A-level only), especially Period 3 oxides (A-level only).
  • You need to be able to explain melting point trends of Period 3 oxides.
  • The key ideas to know are Period 3 oxide.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Period 3 oxide

Why it matters

This objective helps connect Period 3 oxides (A-level only) to exam-style questions, flashcards, and revision notes for Properties of Period 3 elements and their oxides (A-level only).

Quick student answer

Which of the following Period 3 oxides has the highest melting point?

Direct answer

SiO2 has the highest melting point among the Period 3 oxides due to its strong covalent network structure.

Key terms

  • Giant covalent structure: A structure where atoms are bonded together by covalent bonds in a continuous network, resulting in high melting and boiling points.
  • Ionic bonding: A type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Common trap

Confusing melting points of oxides: Remember that ionic oxides generally have higher melting points than covalent oxides due to the strength of ionic bonds.

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