The document provides an introduction to the periodic table. It explains that Dmitri Mendeleev discovered the periodic table and created it as a way to organize all the known chemical elements. The periodic table is organized with elements in vertical columns based on their properties and horizontal rows based on the number of outer electrons. Examples of three elements, fluorine, krypton, and rubidium are then described, including their atomic number, symbol, mass, discoverer, families, and some uses.

1. Intro to the Periodic
Table
S am R us se ll - Pe ri od 1

2. Who discovered the Periodic Table?
Dmitri Mendeleev

3. Why do We Have a Periodic Table?
Wanted a way to
organize all the
elements
Many elements were
still undiscovered
when Mendeleev was
alive
It helped predict what
elements they could
next Mendeleev’s Periodic Table

4. How is the Periodic Table Organized?
Vertical columns are groups or families
(elements in the same family are similar)
Horizontal
rows are
periods
(elements in
the same
period have
the same
number of
outer orbit
electrons)

5. How is the Periodic Table Organized?
Metals Metalloids Nonmetals

6. What is the Relationship bet ween elements?
Transition
Post-transition metals Metalloids Other nonmetals Halogens Noble Gases
metals
Alkaline
earth
metals
Alkali
metals
Lanthanoids
Actinoids

7. Fluorine
Atomic Number - 9
Element Symbol - F
Atomic Mass -
18.99/19.00

8. Fluorine (continued)
Discovered by Henri
Moissan in 1886
In the Halogen family
Fluoride is used for
teeth cleaning
products like
toothpaste

9. Krypton
Atomic Number - 36
Element Symbol - Kr
Atomic Mass -
83.79/83.80

10. Krypton (continued)
Discovered by Sir
William Ramsey and
M.W. Travers in 1898
Used in some
photograph flashes
.0001% Krypton in
our atmosphere

11. Rubidium
Atomic Number - 37
Element Symbol - Rb
Atomic Mass - 85.46

12. Rubidium (continued)
discovered by Gustav
Kirchhoff and Robert
Bunsen
In the Alkali metals
family
Used in special
glasses

13. Sources
"Dynamic Periodic Table." Dynamic Periodic Table. N.p., n.d. Web. 22 Oct. 2012. <http://ptable.com/>.
"The Element Krypton[Click for Isotope Data]." It's Elemental. N.p., n.d. Web. 22 Oct. 2012. <http://education.jlab.org/
itselemental/ele036.html>.
"The Element Rubidium[Click for Isotope Data]." It's Elemental. N.p., n.d. Web. 22 Oct. 2012. <http://education.jlab.org/
itselemental/ele037.html>.
"Fluorine Facts." About.com Chemistry. N.p., n.d. Web. 22 Oct. 2012. <http://chemistry.about.com/od/elementfacts/a/
fluorine.htm>.
"Krypton Facts." About.com Chemistry. N.p., n.d. Web. 22 Oct. 2012. <http://chemistry.about.com/od/elementfacts/a/
krypton.htm>.
"Periodic Table and the Elements." Chem4Kids.com: Elements & Periodic Table. N.p., n.d. Web. 22 Oct. 2012. <http://
www.chem4kids.com/files/elem_intro.html>.
"Periodic Table of the Elements." Periodic Table. N.p., n.d. Web. 22 Oct. 2012. <http://chemistry.about.com/library/
blperiodictable.htm>