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In the process of attempting to ch aracterize a substance, a chemist makes the fo llowing observations: The substance is a silvery white, lustrous metal. It melts at 649∘C and boils at 1105∘C.Its density at 20∘C is 1.738g/cm3.The substance burns in air, producing an intense white light. It reacts with chlorine to give a brittle white solid. The substance can be pounded into thin sheets or drawn into wires. It is a good conductor of electricity. Which of these characteri stics are physical properti es, and which are chemical properties?

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Answer:

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Explanation:

A physical property is one you can observe without changing the chemical composition of a substance.

A chemical property is one you can observe only by changing the chemical composition of a substance.

In this problem, examples of physical properties are:

  • Colour
  • Lustre
  • Melting point
  • Boiling point
  • Density
  • Malleability
  • Ductility
  • Conduction of electricity

Examples of chemical properties are:

  • Burning in air
  • Reaction with chlorine

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