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Question 1

What are the properties of metals ?

Answer 1

• They have a luster (shine).
• They have silvery-grey or golden-yellow
   color.
• They conduct heat and electricity.
• They are ductile (can be drawn into
   wires).
• They are malleable (can be hammered
   into thin sheets).
• They are sonorous (make a ringing
   sound when hit).
Examples of metals are gold, silver, copper

Question 2

What are the properties of elements ?

Answer 2

• The number of elements known at present are more
than 100. Ninety-two elements are naturally occurring and the rest are manmade.
• Majority of the elements are solid.
• Eleven elements are in gaseous state at room
temperature.
• Two elements are liquid at room temperature–
mercury and bromine.
• Elements, gallium and cesium become liquid at a
temperature slightly above room temperature (303 K)

Question 3

What are the differences Mixtures and Compounds ?

Answer 3

Mixtures
• Elements or compounds just mix together to form a
mixture and no new compound is formed
• A mixture has a variable composition.
• A mixture shows the properties of the constituent
substances.
• The constituents can be separated fairly easily by
physical methods.

Compounds
• Elements react to form new compounds.
• The composition of each new substance is always
fixed.
• The new substance has totally different properties.
• The constituents can be separated only by chemical
or electrochemical reactions.