2. The Origin of the Periodic
Table
The Periodic Table was created by
a Russian chemist named Dmitri
Mendeleev.
It was created 1869.
Others before Mendeleev had
organized the elements but
Mendeleev was the creator of the
table.
3. How is the Table
Organized?
The table is organized in rows (or
periods) and columns (or groups/
families).
The periods are the horizontal
rows.
The groups are the vertical
columns.
4. Element Relationship
Elements that are in the same period have the same
number of atomic orbital.
The elements that are in that are in the same group
have the same number of electrons in their outer
orbital (valence electrons).
5. Element: Oxygen (O)
Atomic Number - 8
Atomic Mass - 15.99
This element is used in everyday
life, it’s the air around us that we
need to live. It is a highly
reactive nonmetallic element
that forms compounds. By mass,
oxygen is the third most
abundant element in the
universe.
6. Element: Copper (Cu)
Atomic Number - 29
Atomic Mass - 63.54
You commonly see copper
when using a penny. It has a
very high electrical
conductivity and is used as a
conductor of heat and
electricity.
7. Element: Gold (Au)
Atomic Number - 79
Atomic Mass - 196.96
Gold is seen in nice jewelry, it’s
considered very attractive. It’s
one of the least reactive
chemical elements and has
been very valuable for years.
Gold can resist attacks by
individual acids.
