Chemistry Keynote on the Periodic Table

1. The
Periodic
Table
By: Courtney
Cullins

2. The Beginning
• In 1869, Dmitri Mendeleev had
discovered 63 elements which had
started the Periodic Table.
• As this number grew, scientists
noticed that these elements had
distinct classifications, that grouped
them with each other in different
ways.

3. Grouping
• When the table is read from left to
right, you are reading the periods of
the table.
• When you read the table up and
down, these are called the groups.
• The elements in a group have the
same number of electrons in their
outer orbital

4. Organization

5. Arrangement
• These elements are also listed in
ascending order of their protons.
• “According to quantum mechanical
theories of electron configuration
within atoms, each horizontal row,
or period, in the table correspond to
the filling of a quantum shell of
electrons.”

6. Relationships
• Alkali Metals, Alkali Earth Metals,
Transition Metals, Other Metals,
Non-Metals, Inert Elements, and
Rare Earth Elements
• These are major relationships that
the elements have with one another.

7. Hydrogen
Atomic Number: Hydrogen is
1 estimated to
Element Symbol: make up more
H than 90% of
Atomic Mass: atoms.
1.0078

8. Copper
Atomic Number:
29
Element Symbol:
Cu
Atomic Mass:
63.55
Pure copper is Fun Fact!
soft and Copper can be
malleable and found in the
has a reddish- liver, muscles,
orange and bones of
appearance. animals.

9. Helium
Atomic Number:
Helium never
2
Element Symbol: freezes and is
He lighter than air.
Atomic Mass:
4.0026 boiling point
The
and melting
points of helium
are the lowest of
the elements and
only appears in
gases in extreme