Compounds and Chemical Formulae Lesson Notes

Authors: Classroom lesson material Year: 2026 Venue: Slide deck Link: Science Class pptx Tags: papers chemistry education science y7 Created: 2026-04-22 05:00:31Z Last Updated: 2026-04-22 13:10:13Z

Summary

This lesson introduces Compounds, Mixtures, Molecules, and Chemical Formulae, then contrasts how compounds differ from their source elements in both composition and properties.

Core Ideas

• Compounds are chemically bonded substances with fixed composition.
• Mixtures are not chemically bonded and can often be physically separated.
• Chemical formulae encode the relative number of atoms in a compound.
• Naming rules include -ide for simple binary compounds and common -ate patterns when oxygen-containing groups are present.

Worked Examples Mentioned

• H2O, CO2, MgO, NaCl, FeS, Al2O3, CaCO3, MgCl2, H2SO4
• Iron + sulfur mixture vs iron sulfide compound demonstration

Related Notes

• Compounds
• Mixtures
• Molecules
• Chemical Formulae
• Elements
• Atoms
• Chemical Symbols

Sources

• sources/Compounds and chemical formulae PPT (1).pptx
• sources/Compounds and chemical formulae PPT (2).pptx