CBSE Class 10 Science Metals and Non-metals: Chapter Guide

Metals and Non-metals is Chapter 3 of CBSE Class 10 Science, coming right after Acids, Bases and Salts. It belongs to the Chemical Substances unit, which the 2026-27 syllabus weights at 25 marks out of the 80-mark theory paper. Chemistry questions in this unit are very scorable if you build understanding first, because the same few patterns come back again and again in one-mark, three-mark and case-based questions.

What the Syllabus Actually Lists

According to the published CBSE Class 10 Science syllabus for 2026-27, this chapter covers five areas:

• Properties of metals and non-metals. Physical properties such as lustre, malleability, ductility and conductivity, and the chemical properties that follow from them.
• Reactivity series. The ordering of metals by how readily they react, and what that ordering lets you predict.
• Formation and properties of ionic compounds. How electron transfer builds a compound like sodium chloride, and why such compounds behave the way they do.
• Basic metallurgical processes. How metals are obtained from their ores and refined.
• Corrosion and its prevention. Why iron rusts and how it is protected.

The syllabus also lists a related practical: observing how zinc, iron, copper and aluminium behave in salt solutions and ranking them by reactivity. That practical is really the reactivity series in miniature, so do not treat it as separate work. Your school may reorder or trim chapters across terms, so check the latest syllabus document from CBSE or your school.

The Reactivity Series: Your Master Key

The reactivity series arranges metals from the most reactive (potassium, sodium, calcium, magnesium, aluminium) down to the least reactive (copper, silver, gold), with zinc, iron, lead and hydrogen in between. Do not just memorise the order. Use it to answer four kinds of question:

• Displacement. A more reactive metal displaces a less reactive one from its salt solution. Zinc pushes copper out of copper sulphate; copper cannot push zinc out of zinc sulphate.
• Reaction with water and acids. Highly reactive metals react with cold water, others only with steam, and some with neither. Metals above hydrogen release hydrogen gas from dilute acids; copper, silver and gold do not.
• Extraction method. Where a metal sits in the series decides how it is obtained from its ore.
• Observation questions. In the practical, the colour of the solution and the deposit on the metal tell you which metal is more reactive.

A good habit is to write the series on the first page of your notebook and cover it when practising, so you recall it rather than recognise it.

Ionic Compounds Without the Confusion

Ionic compounds form when a metal atom gives electrons away and a non-metal atom takes them. The metal becomes a positive ion, the non-metal a negative ion, and the attraction between them is the ionic bond. Draw the electron transfer for sodium chloride, magnesium chloride and magnesium oxide until you can do it without looking. The properties that questions ask about all follow from this picture: ionic compounds are usually solid and hard, have high melting and boiling points, dissolve in water, and conduct electricity when molten or dissolved but not when solid, because the ions can only move once they are free.

Metallurgy: Think in Steps

Students lose marks here by mixing up terms. Keep the sequence straight: the ore is first concentrated to remove impurities, then converted to the metal by a method that suits its position in the reactivity series, and finally refined. Very reactive metals are generally obtained by electrolysis of their molten compounds. Metals in the middle are usually obtained by reducing their oxides, often with carbon. Metals low in the series can be obtained by heating. Roasting and calcination are a classic trap: roasting is heating a sulphide ore in excess air, while calcination is heating a carbonate ore in limited air. Write both definitions side by side once and the confusion disappears.

Corrosion and Where Marks Leak

Rusting needs both air (oxygen) and moisture, which is why the standard experiment with three test tubes compares iron nails kept with water only, with dry air only, and with both. Prevention methods you should be able to name and explain are painting, oiling, galvanisation and alloying. Be ready to say why galvanisation works: the zinc layer protects the iron even where it is scratched.

• Unbalanced equations. Many metal reactions appear as equations in the paper. Balance them and include state symbols where asked.
• Saying only that a metal is more reactive. Explain the observation: what you saw, and what it tells you.
• Mixing up roasting and calcination, or an ore and a mineral. Learn the definitions word for word.
• Forgetting exceptions. Mercury is a liquid metal, sodium and potassium are soft enough to cut with a knife, and non-metals such as graphite conduct electricity.
• Drawing sloppy diagrams. Electron-transfer diagrams and the rusting experiment both earn marks for neat, labelled work.

A One-Week Plan for the Half-Yearly Window

• Day 1: Physical and chemical properties. Make a two-column table of metals versus non-metals, including the exceptions.
• Day 2: The reactivity series. Learn the order and solve ten displacement questions.
• Day 3: Reactions of metals with oxygen, water and acids. Write and balance every equation.
• Day 4: Ionic compounds. Draw electron-transfer diagrams and revise their properties.
• Day 5: Metallurgy and corrosion. Write the steps from ore to pure metal, and learn the rusting experiment.
• Day 6: A timed, chapter-only test. Mark it strictly and sort every error into recall, equation or explanation.
• Day 7: Redo only the questions you got wrong, then rest.

Where IndiaSchool.ai Fits

IndiaSchool.ai has an AI lesson and unlimited practice tests with instant evaluation for every Class 10 Science chapter, so Day 6 of the plan is easy to run and you can see straight away which kind of error keeps repeating. If you want a paper limited to this chapter, the custom question paper tool can build one, and the syllabus explorer shows which chapters are available for your board and class. For something more hands-on, Play With Chemistry lets you work with reactions interactively, and one lesson is free to try. You can also browse more chapter guides on the blog.

The Bottom Line

Metals and Non-metals rewards a student who learns one list well and then uses it everywhere. Master the reactivity series, draw your electron transfers, keep the metallurgy steps in order, and explain every observation in full sentences. A week of calm, structured revision is enough to turn this chapter into dependable marks.