Q13 of 252 Page 56

What is meant by saying that metals are sonorous?

Metals produce ringing sound when beaten, i.e. metals are sonorous.
This is the reason that bells are made of metal.


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11

What is meant by saying that metals are malleable and ductile?

 12

What is meant by saying that non-metals are brittle?

 14

What is meant by saying that metals are lustrous?

 15

What is the general name of the materials which contain at least two pure substances and show the properties of their constituents?