Class-10, NCERT (CBSE), Metals and Their Physical Properties

1. Class- X
Physical Science
Metals: Physical Properties
AKANKSHA
INTEGRATED B.SC. B.ED
LOVELY PROFESSIONAL UNIVERSITY, PHAGWARA

2. Physical State
• Metals generally exist in solid state.

3. Exception
• Hg (liquid at room temp).
• Ga : 30degree Celsius.
• Cs : 28.5 degree Celsius.

4. Luster
• Metals have a shining surface.

5. Exception
• Lead ( dull appearance).

6. Hardness
• Metals are hard in nature.

7. Exception
• Na, K, Rb, Cs, Hg, Ga, Zn
• (soft metals can be cut by knife).

8. Malleable
• Can be beaten into sheets.
• (Au and Ag are more malleable then other metals).

9. Ductile
• Can be drawn into wires.
• (Au and Ag more ductile).
• For example: 2km wire can be drawn from 1g of
Gold.

10. Exception metals for Malleability
and Ductility.
• Hg, Na, K, Zn.

11. Questions
• Que-1. Due to which property of metals are metallic
foils prepared?
• Que-2. Name one metal, which is in liquid state at
room temperature.
• Que-3. Why are metals used for making cooking
vessels?
• Que-4. Metallic wire exist but not wooden wire,
why?