‹ Class 10 · Ch 3
Metals and Non-metals · Principle 7 of 46

The other group

Non-metals are mostly the opposite of metals.

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NCERT: 3.1.2 Non-metals

Think

Carbon and sulphur

Carbon, sulphur, iodine, oxygen and hydrogen are examples of non-metals.

How do non-metals compare with metals in their physical properties?

What this lesson covers

The idea

Non-metals are either solids or gases, except bromine which is a liquid; their properties are opposite to those of metals: they are neither malleable nor ductile and are bad conductors of heat and electricity.

Carbon and sulphur

Carbon, sulphur, iodine, oxygen and hydrogen are examples of non-metals.

How do non-metals compare with metals in their physical properties?

  • Mostly the opposite
  • Exactly the same
  • They cannot be compared

Metal or non-metal

Tap the group each property belongs to.

Opposite properties

Non-metals are either solids or gases, except bromine, which is a liquid. Their properties are opposite to those of metals: they are neither malleable nor ductile, and they are bad conductors of heat and electricity.

Non-metals are either solids or gases, except bromine which is a liquid; their properties are opposite to those of metals: neither malleable nor ductile and bad conductors of heat and electricity.

Notes

Non-metals are solids or gases (bromine is a liquid), neither malleable nor ductile, and bad conductors.

Check yourself

Which one is a non-metal?

Which non-metal is a liquid?

A non-metal is tested for malleability and ductility. The result is that it ...

Non-metals are ... of heat and electricity.

  • Copper. Copper is a metal; the book lists carbon, sulphur, iodine, oxygen and hydrogen as non-metals.
  • Silver. Silver is a metal; the book lists carbon, sulphur, iodine, oxygen and hydrogen as non-metals.
  • Sulphur — correct. Yes!
  • Bromine — correct. Yes!
  • Mercury. Mercury is a liquid, but it is a metal.
  • Oxygen. The book says non-metals are solids or gases, except bromine; oxygen is not the liquid one.
  • can be beaten into thin sheets. Non-metals are not malleable, so they cannot be beaten into thin sheets.
  • is neither malleable nor ductile — correct. Yes!
  • can be drawn into thin wires. Non-metals are not ductile, so they cannot be drawn into wires.
  • good conductors. Metals are the good conductors; non-metals are bad conductors.
  • the best conductors. Silver and copper are the best conductors of heat; non-metals are bad conductors.
  • bad conductors — correct. Yes!
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