The periodic table of elements was developed in Russia by Dmitri Mendeleev in 1869. He arranged the elements in order of increasing atomic mass, with elements in the same groups exhibiting similar chemical properties. Elements in the same row also show a gradual change in properties from left to right as atomic number increases. The periodic table provides a systematic organization of the chemical elements that displays their atomic structures and properties.

1. PERIODIC TABLE OF ELEMENTS
Marissa Dodd
Period 4
October 25, 2012
Sunday, October 28, 12

2. ✴ How was it
developed?
Mendeleev arranged the
elements by atomic mass.
✴ Where was it
developed?
The periodic table of
elements was ✴ Who developed
developed in Russia.
it?
It was developed by a
35-year-old Dmitri
Mendeleev.
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3. HOW IS THE TABLE ORGANIZED?
•The periodic table is organized by atomic mass.
•From the top left it has the least atomic mass, but
when you move farther to the bottom right
everything gets heavier.
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4. WHAT IS THE RELATIONSHIP?
• Chemical elements in the same group tend to have similar
chemical properties. Those in the same row have properties
that change slowly from one end of the row to the other.
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5. ELEMENT #1
Carbon
6
C
12.011
Ex: Pyrolytic graphite, diamond, coal.
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6. ELEMENT #2
Strontium
38
Sr
87.62
Ex: Sensodyne Mint toothpaste, bone-building supplements,
glow-in-the-dark paint.
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7. ELEMENT #3
Chromium
24
Cr
51.996
Ex: Cheap stainless steel, vapor deposited crystals,
phonograph needles.
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8. SOURCES CITED
www.periodictable.com
www.en.wikipedia.org/wiki/Periodic_table
www.en.wikipedia.org/wiki/Dmitri_Mendeleev
www.scienceclarified.com/Oi-Ph/Periodic-
Table.html#b
Sunday, October 28, 12