Presentation for chemistry course on the topic of metals, a brief overview.

1. Metals
Structure and bonding

2. Table of contents
• Metals
• Metallic bonding & Metal’s structure
• Giant Metallic Lattice
• Properties
• Place in periodic table

3. Metals
--is a solid material (an
element, compound, or alloy)
that is typically hard, opaque,
shiny, and features good
electrical and thermal
conductivity.

4. Metallic bonding &
Metal’s stricture
Metallic bonding is occurs in Metals. It is the electrostatic
attraction between positive metal ions and delocalized
electrons.
A giant metallic lattice is a three-dimensional structure of
positive ions and delocalized electrons, bonded together by
strong metallic bonds.

5. Giant Metallic
Lattice
A giant metallic lattice is often
referred to as a lattice of
positive ions fixed in position
and surrounded by a sea of
electrons. The electrons are
delocalized and can move.

6. Properties
There are three main properties of giant metallic lattice
structure:
• High melting point and boiling point
• Good electrical conductivity
• Malleability and ductility

7. High melting point and
boiling point
Most metals have high malting and boiling
point.(except Mercury(Hg), its melting point is -
38.83 °C) The electrons are free to move
throughout the structure, but the positive ions
remain where they are. The attraction between
the positive ions and negative delocalized
electrons is strong. High temperature are
needed to break the metallic bonds are
dislodge the ions from their rigid positions
within the lattice. Metals can have 600-1600°C
melting point.

8. Good electrical
conductivity
Metals are good conductors of electricity. The delocalized
electrons can move freely anywhere within the metallic
lattice. This allows the metal to conduct electricity, even in
the solid state.

9. Malleability and
ductility
Metals are ductile and malleable.
Ductile means: can be drawn out or stretched.
Ductility permits metals to be drawn into wires.
Copper Wire

10. Malleability and
ductility
Malleable means: can be hammered into
shape. Many metals can be pressed into
shapes or hammered out into thin sheets.

11. Malleability and
ductility
The delocalized electrons are largely responsible for this
properties. Because they can move, the metallic structure
has a degree of give, which allows atoms or layers to slide
past each other.

12. Place in periodic table

13. Place in periodic table
Each vertical columns in periodical table is called a group,
and contains element with similar properties. So almost all
metals are in 1st , 2nd and 3rd groups.
Each horizontal row is called a period. Across each period,
elements change from metal to non-metal. As you move
down the Periodic Table, this change takes place further to
the right. So, trends in properties can exist vertically down
a group as well as horizontally across a period.