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A steel gate. A brass bell. A wooden bench. Which are metals?
Your NCERT book calls this chapter The World of Metals and Non-metals.
What you will learn
- Shine and sound. Most metals bounce light back and ring when struck.
- Beaten and drawn. A metal spreads flat, or pulls into wire.
- Heat and the loop. The loop is a path for electric current. Metals carry heat and current well. One non-metal does too.
- Non-metals around us. Nitrogen and sulfur are non-metals.
- Rusting. Iron needs air and water together to turn orange.
- Choosing. The job decides which property, or quality, matters.
- Oxides. A metal's oxide is usually basic. A non-metal's is usually acidic.
- Kept away. Sodium is stored in kerosene. White phosphorus is stored in water.
- Jewellery. Gold and silver shine and shape easily.
- Non-metal jobs. Breathing, fertilisers, clean water, antiseptics.
Need a quick recap?
- Which things does a magnet pull? (in Exploring Magnets). Iron and steel say yes.
- Hard or soft? (in Materials Around Us). A test decides it, not a look.
- Some things let the loop through (in Electricity). A conductor lets current pass.
Stay safe
Do not heat any metal in real life. Every test here runs on the screen.