Properties of metals & non metals

1. Metals & Non metals
Chapter-3

2. Metals
A metal is a material or substance which
has certain
• Physical Property
• Chemical Property

3. Physical Property of Metals
• Solid at room temperature-
Exception: Hg is liquid at room
temperature
• Silvery-gray
exception: Au and Cu

4. Physical Property of Metals
• Conductors-
a) Good Conductors-Silver, Gold
b) Poor Conductors-Hg, Lead
• Malleable- (a property of a metal)
able to be hammered or pressed
into shape without breaking or
cracking.
Example-Gold and Silver are most
Malleable

5. Physical Property of Metals
• Ductile- is the ability to be stretched. It is often
characterized as the materials ability to be pulled into
a wire.
• Gold, copper are most ductile
• Metallic luster (shine)

6. Imp points for Metals
• Metals are sometimes described as a lattice of positive
ions surrounded by a cloud of delocalized electrons.
• On the periodic table, a diagonal line drawn from
boron (B) to polonium (Po) separates the metals from
the non-metals.

7. Imp points for Metals
• Most elements on this line are metalloids,
sometimes called semi-metals; elements to
the lower left are metals; elements to the
upper right are non-metals.

8. Imp points for Metals
• Metals have a high melting point. They
are also very dense.

9. Chemical Properties
• Lose Electrons
(makes positive ion)
• Corrode easily

10. Non-Metals
Physical Properties:
• Can be gas, solid, or liquid at room temperature
• Come in all colors
• No metallic luster
• Poor conductors
• Brittle
• Odors or pungent
Chemical Properties:
• Tend to gain electrons
(makes negative ion)

11. METALLOIDS
• Properties and characteristics of both metals
and nonmetals
• Along the staircase/steps of the periodic table
• EXCEPT: Al, At

12. Chemical Properties of Metals
A. Reaction of metal with Air
B. Reaction of metal with water
C. Reaction of metal with acid (dilute)
D. Reaction of metal with solution of other
metal salts
E. Reaction of metal with non-metals