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

Chemistry · A-Level · AQA · AQA A-level Chemistry - (7405) · Specification point · 3.2.4 · Inorganic chemistry

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

The reactions of the Period 3 elements with oxygen are considered. The pH of the solutions formed when the oxides react with water illustrates further trends in properties across this period. Explanations of these reactions offer opportunities to develop an in-depth understanding of how and why these reactions occur.

Content	Opportunities for skills development
$The reactions of Na and Mg with water. The trends in the reactions of the elements Na, Mg, Al, Si, P and S with oxygen, limited to the formation of Na₂O, MgO, Al₂O₃, SiO₂, P₄O₁₀, SO₂ and SO₃ The trend in the melting point of the highest oxides of the elements Na-S The reactions of the oxides of the elements Na-S with water, limited to Na₂O, MgO, Al₂O₃, SiO₂, P₄O₁₀, SO₂ and SO₃, and the pH of the solutions formed. The structures of the acids and the anions formed when P₄O₁₀, SO₂ and SO₃ react with water. Students should be able to: explain the trend in the melting point of the oxides of the elements Na-S in terms of their structure and bonding explain the trends in the reactions of the oxides with water in terms of the type of bonding present in each oxide write equations for the reactions that occur between the oxides of the elements Na-S and given acids and bases.$

Content

Opportunities for skills development

The reactions of Na and Mg with water. The trends in the reactions of the elements Na, Mg, Al, Si, P and S with oxygen, limited to the formation of Na₂O, MgO, Al₂O₃, SiO₂, P₄O₁₀, SO₂ and SO₃ The trend in the melting point of the highest oxides of the elements Na-S The reactions of the oxides of the elements Na-S with water, limited to Na₂O, MgO, Al₂O₃, SiO₂, P₄O₁₀, SO₂ and SO₃, and the pH of the solutions formed. The structures of the acids and the anions formed when P₄O₁₀, SO₂ and SO₃ react with water. Students should be able to: explain the trend in the melting point of the oxides of the elements Na-S in terms of their structure and bonding explain the trends in the reactions of the oxides with water in terms of the type of bonding present in each oxide write equations for the reactions that occur between the oxides of the elements Na-S and given acids and bases.

Properties of Period 3 elements and their oxides (A-level only) (3.2.4) | AQA A-level Chemistry - (7405) | KnowledgeSet