Dmitri Mendeleev created the periodic table in 1869 by organizing the elements according to their atomic number, allowing elements with similar properties to be grouped together vertically. The periodic table is organized into vertical columns called groups based on valence electrons and horizontal rows called periods based on atomic mass and number. Elements in the same group have the same number of valence electrons and properties become more metallic from left to right and more nonmetallic from top to bottom.

1. Periodic Table
Period 6
By: Da k o ta S ch a rn ic k

2. Who developed the Periodic
table?
Dmitri Mendeleev created the
Periodic table in Russia on
1869.
The Periodic table is made by
ordering the elements according
to their atomic number.
He created it because he was
trying to find elements with
similar properties.

3. How is the table organized.
The Periodic table is organized
by Atomic number, metals,
nonmetals, periods, groups,
and stability.
It’s also organized with vertical
columns and horizontal rows.
Vertical columns are called
groups or families. The
horizontal rows are called
periods.

4. Groups on the Periodic table.

5. Periods on the Periodic table.

6. The relationships bet ween
elements
Each family or group the
elements have the same
number of valence electrons.
The elements are grouped
according to element. They
also go in increasing atomic
mass and number.
Higher melting/boiling
point as you go in the
middle of the table.

7. Cesium
Name: Cesium
Element symbol: Cs
Atomic Number: 55
Atomic mass:
132.90546 amu

8. Sodium
Name: Sodium
Element symbol: Na
Atomic number: 11
Atomic mass:
22.98977 amu

9. Tungsten
Name: Tungsten
Element symbol: W
Atomic number: 74
Atomic mass:
183.84 amu

10. Work cited
http://en.wikipedia.org/wiki/Periodic_table
http://curiosity.discovery.com/question/periodic-table-original-
organization
http://chromiumj11.imascientist.org.uk/2011/06/how-was-the-
periodic-table-made-and-who-invented-it
http://www.chemicalelements.com/