The periodic table was created by Dmitri Mendeleev between 1868 and 1870 to fill a need for a proper chemistry textbook. He organized the elements in order of increasing atomic mass into rows called periods and columns called groups based on similarities between elements. The periodic table arranges elements into metals, nonmetals, and other groups based on their chemical and physical properties.

1. The Periodic Table
Taylor Meyer
Period 6

2. Who Created It?
• The periodic table was
created by Dmitri
Mendeleev between
1868 and 1870.

3. Why Was It Created?
• Mendeleev was a
professor and claimed
that he could not find a
proper text book.
• This was during the
time when he came up
with his chemical and
physical theory.
• He decided to develop a
table of elements.

4. How Is It Organized?
• Each Horizontal row is a period.
• Each vertical row is a group.
• Every element in the same period or group
has something in common with the others.
• The elements are arranged in order from
smallest atomic mass to largest.

5. Element Relationships
Metals Nonmetals
• Alkali Metals • Metalloids
• Alkaline Earth • Other Nonmetals
Metals
• Lanthanoids • Halogens
• Actinoids • Noble Gases
• Transition Metals
• Post-Transition

6. NEON
Eleme
nt Sym
b o l:
Ne
Atomic Mass: 20.17
mb er :
ic Nu
Atom 10
Used in Neon Lights!

7. Potassium
er : 19
Numb
ic
Ato m
Element Symbol: K
Atomi
c Mass:
39. 09

8. Chlorine
Elem
ent
Sym
b o l: C
l
Atomic Symbol: 17
ss: 2 5. 45
tomi c Ma
A