1. Lucia Artigas #1
9-2 21.10

2. Outline
• 3. Periodic Table
• 4. What is the elements Periodic Table Name?
• 5. What is Argon?
6. Argon Ar
• 7. What is its chemical makeup?
8. Building the Argon (Ar) Atom
• 9. Facts
• 10. What can it be mixed with?
• 11. What can it not me mixed with?
• 12. What is its basic use?
• Citation

4. •What is the
elements
Periodic Table
Name?
Ar= Argon

5. What is Argon?
• third most common gas in the world, even more so
than carbon dioxide.
• The word “argon” means inactive, inert in Greek
and refers to this gas in that it reacts with very few
other elements in the periodic table. It has eight
electrons in the outer shell, which make it very
stable and resistant to reactions.
• Argon is a gaseous chemical element which
makes up almost one percent of the Earth's
atmosphere. Among the noble gases, argon is
generally considered to be the most abundant, and
it is sometimes used to replace other noble gases
in situations where an inert gas in needed. The
relatively nonreactive gas has a number of
industrial uses, and argon isotopesare also used in
radiocarbon dating for very old artifacts.
Consumers may interact with argon now and then,
primarily indirectly.

6. Argon Ar
Atomic # Classification:
18 Noble gas
39.948
amu
Non-metallic
Protons/Electrons
: 18
Group
18 •Colorless Gas
Number
Period 3
of Neutrons: 22

7. What is its chemical makeup?
• If we add one proton and one electron to Chlorine
we get an atom of the element Argon.
• For Argon both Shell #1, Shell #2 and the s-orbital
of Shell #3 are full. The first two p-orbitals of Shell
#3 are full with two electrons and each of the other
p-orbital of Shell #3 contains one electron for a
total of 5 in the p-orbitals of Shell #3. The added
electron that makes Chlorine into Argon will fill
the third p-orbital of the third Shell (Shell #3)
leading to a completely full Shell #3 as shown in
the picture above.
• Argon has 18 protons and 18 electrons which gives
it an Atomic Number (Z) of 18.

8. Building the Argon (Ar) Atom

9. • Date of Discovery: 1894
Discoverer: Sir William Ramsay Lord Rayleigh at 1894 in Scotland.
Name Origin: From the Greek word argon (inactive)
The men had earlier noticed that a sample of nitrogen from the air
appeared to be heavier than nitrogen extracted from other sources, and
they theorized that the nitrogen might actually be mixed with other
gases. Experimentation proved this theory correct, and they named the
gas they discovered argon, named after the Greek argos, or “lazy one,”
in a reference to the low reactivity of the gas.
• Uses: Lighting
Facts
Obtained From: air

10. What can it be mixed with?
• Although argon is a noble gas, it has been found to have the capability of
forming some compounds. For example, the creation of the molecule argon
fluorohydride (HArF), a metastable compound of argon
with fluorine and hydrogen, was reported by researchers at the University
of Helsinki in 2000. Argon-containing ions and excited state complexes,
such as ArH+ and ArF, respectively, are known to exist. Theoretical
calculations have shown several argon compounds that should be stable but
for which no synthesis routes are currently known.
• Argon, mixed with nitrogen, is used as a filler gas for incandescent light
bulbs.

11. 4)What can it not me mixed with?
• Argon does not have any biological use. Diazotrophs, bacteria that
absorb nitrogen and convert it to ammonia, may absorb argon, but
they cannot apply it. Argon is non-water hazardous and no known
environmental effects have occurred.
Argon naturally has three stable isotopes, and we now know of nine
instable isotop.
•

12. 5)What is its
basic use?
• Argon is used in situations where materials need to be protected
from oxygen or other gases. A good example is an incandescent
lightbulb, which consists of a metal wire inside a clear glass bulb.
An electric current passes through the wire, causing it to get very
hot and give off light.
Argon is also used in welding. Welding is the process by which two
metals are joined to each other. In most cases, the two metals are
heated to very high temperatures. As they get hot, they melt
together.
• Argon is also used in argon lasers and argon-dye lasers. A laser is
a device that produces very bright light of a single color
(frequency). An argon laser is used to treat skin conditions. The
laser shines a blue-green light on the affected area of the skin.

13. Citation
• "Argon." - Elements Database. Ed. © Art Branch Inc. © Art Branch Inc.,
2012. Web. 30 Oct. 2012. <http://www.elementsdatabase.com/Argon-
Ar-18-element/>.
• Bentor, Yinon. Chemical Element.com - Argon. Oct. 30, 2012
<http://www.chemicalelements.com/elements/ar.html>.
• Winter, Mark. "Argon." WebElements Periodic Table of the Elements.
[The University of Sheffield and WebElements Ltd, UK]., 1993-2012.
Web. 30 Oct. 2012. <http://www.webelements.com/argon/>.
• "Atomic StructureProtons-Electrons-Atomic NumberAtomic Mass."
Atomic Structure. N.p., n.d. Web. 30 Oct. 2012. <http://www.homework-
help-secrets.com/atomic-structure.html>.
• Andy Jorgensen (Lead Author);Lori Zaikowski (Topic Editor) "Argon".
In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.:
Environmental Information Coalition, National Council for Science and
the Environment). [First published in the Encyclopedia of Earth April
10, 2009; Last revised Date October 29, 2012; Retrieved October 30,
2012 <http://www.eoearth.org/article/Argon?topic=49557>