This document provides a brief history of the periodic table, outlining key contributors and developments from 1649 to present day. It describes how Hennig Brand discovered phosphorus in 1649, followed by early classification attempts by de Chancourtois, Dobereiner and Newlands in the 1800s. Meyer, Mendeleev and others refined periodic tables in the late 1800s based on properties and atomic mass. Later, discoveries like argon by Rayleigh and the concept of atomic number by Moseley led to the modern periodic table. The document concludes by showing different periodic table models today and interactive online versions.

1. A Brieft History: The
Periodic Table

2. Hennig Brand
• 1649
–
Discovered
the
element
Phosphorus.
The
pictures
below
is
“red
phosphorus.”

3. A.E. Beguyer de
Chancourtois
• 1817
–
Listed
elements
by
increasing
atomic
mass
on
a
cylinder.

4. Johann Dobereiner
• 1862
–
Proposed
the
Law
of
Triads,
where
three
elements
in
nature
with
the
mass
of
the
middle
element
being
the
average
of
the
other
two.

5. John Newlands
• 1863
–
Classified
the
56
known
elements
into
a
table
with
11
groups
based
on
properLes
.
Law
of
Octaves:
any
element
will
behave
similarly
to
the
8th
element.

6. Lothar Meyer
• 1864
–
Developed
a
shortened
version
of
the
table
only
showing
half
of
the
known
elements,
in
order
of
atomic
mass
and
differences
in
behavior
were
due
to
mass.

7. Dmitri Ivanovich
Mendeleev
• 1869
–
Rearranged
elements
in
order
of
their
properLes.
He
showed
a
verLcal,
horizontal,
and
diagonal
relaLonship
between
the
63
known
elements.

8. Lord Rayleigh
• 1895
–
Discovered
argon
and
found
it
didn’t
fit
in
the
current
groups.
In
1898
he
proposed
a
new
group
to
be
called
zero
group

9. Ernest Rutherford
• 1911
–
Studied
nuclei
which
led
to
the
concept
of
nuclear
charge.

10. Henry Mosely
• 1913
–
Published
results
of
x-­‐ray
wavelengths
of
elements
which
proved
the
elements
are
in
order
of
atomic
number.

11. Glenn Seaborg
• 1940
–
Discovered
plutonium
and
all
elements
from
94-­‐102.
He
moved
the
Lanthanides
and
AcLnides
below
the
table.

12. Current Periodic Table
2012

13. Different Types of
Periodic Tables

14. Hydrogen is removed:

15. Pictures showing where
they’re found:

16. 3D Model:

17. Visual: Pictures of actual
elements

18. Circular Model:

19. 3D Desk Periodic Table

20. Interactive Periodic Tables
• hZp://www.ptable.com/
• hZp://www.chemicalelements.com/
• hZp://www.webelements.com/
• hZp://www.periodicvideos.com/

21. Star
Wars:
The
Empire
Strikes
Back

22. They even sell products!