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Is Matter Around Us Pure ? — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?4 Marks
Question
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
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Answer

As the given element is sonorous and highly ductile, therefore, it is categorised as a metal. Some other e pected characteristics of are:
  1. It should possesses metallic lustre and can be polished.
  2. It should be good conductors of heat and electricity.
  3. It should be ductile.
  4. It should be malleable.
  5. It should has high tensile strength.
  6. It should has high densities and melting point/boiling point too.
  7. It should be hard (except sodium and potassium which are soft metals).
  8. It should be solid at room temperature (except mercury, which is liquid at room temperature).
While the characteristics of non-metals are:
  1. Non-metals are neither malleable nor ductile and do not conduct electricity.
  2. Metalloids show some properties of metals and some other properties of non-metals.

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