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Year 8 - Science

Naming compounds

Atoms, elements and compounds

Unit Summary

This unit explores the basic atomic model, the differences between atoms, elements, and compounds, and the varying physical and chemical properties of elements. It covers chemical symbols, formulae, SI units, and IUPAC nomenclature, emphasising their use in describing elements and compounds.

Lesson Summary

You will learn to name compounds from their chemical formulae.

Key Notes

  • The name of a simple metal–non-metal compound ends '-ide' to indicate bonding has occurred.
  • Some common groups of compounds are metal carbonates, metal sulfates and metal nitrates.
  • Compounds of metal atoms bonded to -CO₃ are called metal carbonates.
  • Compounds of metal atoms bonded to -SO₄ are called metal sulfates.
  • Compounds of metal atoms bonded to -NO₃ are called metal nitrates.

Vocabulary To Learn

  • metal sulfate: Compound is made of a metal bonded to a sulfate group. The sulphate group is -SO₄.
  • metal carbonate: Compound is made of a metal bonded to a carbonate group. The carbonate group is -CO₃.
  • metal nitrate: Compound is made of a metal bonded to a nitrate group. The nitrate group is -NO₃.

Common Mistakes To Avoid

  • Students often forget to change the non-metal name to either -ide or -ate.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

The name of a simple metal–non-metal compound ends '-ide' to indicate bonding has occurred. Some common groups of compounds are metal carbonates, metal sulfates and metal nitrates.

2. Define this scientific word and use it in context. 'metal sulfate'

Compound is made of a metal bonded to a sulfate group. The sulphate group is -SO₄. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Students often forget to change the non-metal name to either -ide or -ate. Correction: Emphasise when the non-metal reacts with a metal it changes its name to -ide. It is -ate if the non-metal is also bonded to oxygen.

More Lessons In This Unit

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