information about the periodic table

1. THE PERIODIC TABLE

2. What is the Periodic Table?
 The periodic table is a tabular display of the
chemical elements, organized on the basis of
their properties.
 Elements are presented in increasing atomic
number.

3. The periodic table is divided in:
 Groups: 18
 Periods: 7
The Elements are divided in:
•Metals
•Nonmetals
•Alkali metals
•Alkaline earth metals
•Halogens
•Noble gases

4. The Periodic table help us to:
 Find information about the elements.
 To solve problems that have to be with the
elements.
 Find the atomic mass of the elements.
 Find the valences of each element.

5. Groups
 A group or family is a vertical column in the
periodic table. Groups are considered the
most important method of classifying the
elements. In some groups, the elements have
very similar properties and exhibit a clear
trend in properties down the group.
 Elements in the same group show patterns in
atomic radius, ionization energy, and
electronegativity.

6. Periods:
 A period or series is a horizontal row in the
periodic table. Although groups are the most
common way of classifying elements, there
are regions where horizontal trends are more
significant than vertical group trends, such as
the f-block, where the lanthanides and
actinides form two substantial horizontal
series of elements.

7. Conclusion:
 The periodic table has 118 elements. And
each elements has a symbol and a atomic
number.
 You can round the atomic mass of each
element.
 Is very important to know everything about
the periodic table.