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Show on a big screenAn iron gate left in the rain grows rust. A galvanised gate stays free of rust much longer. Galvanised means coated with zinc.
This track is Metals and Non-metals. It is Chapter 3 of your Class 10 Science book. One ordered list, the reactivity series, explains much of it.
What this track covers
- Two kinds of element: physical properties and the exceptions.
- What an oxide tells: acidic, basic, amphoteric and neutral oxides.
- With air, water and acid: how metals react.
- Who pushes whom out: displacement, one metal taking another's place.
- The reactivity series: the list that predicts.
- Compounds that carry charge: ionic compounds.
- Getting a metal out: extraction from ores.
- Rust and what stops it: corrosion and galvanising.
- Mixed on purpose: alloys.
- Purifying copper: electrolytic refining.
Quick catch-up
None of this is required. Read a line only if it feels shaky.
- Metals shine, ring and conduct.
- Atoms have shells of electrons.
- One element can take another's place.
One rule before anything else
Every lab here is a picture on a screen. Never try these reactions at home. Sodium reacts violently with water. Only a teacher may show it.