Group 18 noble gases

Ashley Arroyo,Christopher Martinez

Elements in this group

Helium(He)

Neon(Ne)

Argon(Ar)

Krypton(Kr)

Xenon(Xe)

Radon(Rn)

Description of each element

Helium

Symbol of the element. He

Atomic number of the element. 2

Atomic mass of the element. 4

Picture of elements atomic structure.

How many valence electrons does this element have? 2
What are the uses for this element?
As an inert gas shield for arc welding.As a cooling medium for nuclear reactors.

Who discovered this element? Jules Cesar Janss

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Neon

Symbol of the element. Ne

Atomic number of the element. 10

Atomic mass of the element. 20

Picture of elements atomic structure.

How many valence electrons does this element have? 8
What are the uses for this element?
To make gas lasers.

Who discovered this element? Ramsay and Travers

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Argon

Symbol of the element. Ar

Atomic number of the element. 18

Atomic mass of the element. 40

Picture of elements atomic structure.

How many valence electrons does this element have? 8
What are the uses for this element?
It is used in electric light

bulbs and in fluorescent tubes at a pressure of about 400 Pa. and

fluorescent light bulbs.

Who discovered this element? Cavendish.

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Krypton

Symbol of the element. Kr

Atomic number of the element. 36

Atomic mass of the element. 83.80

Picture of elements atomic structure.

How many valence electrons does this element have? 8
What are the uses for this element?
Photographic flashes

Who discovered this element? Ramsay

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Xenon

Symbol of the element. Xe

Atomic number of the element. 8

Atomic mass of the element. 131.29

Picture of elements atomic structure.

How many valence electrons does this element have? 8
What are the uses for this element?
Photographic flash lamps

Who discovered this element? William Ramsay

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Radon

Symbol of the element. Rn

Atomic number of the element. 86

Atomic mass of the element. 222

Picture of elements atomic structure.

How many valence electrons does this element have? 8
What are the uses for this element? Used by a few hospitals by pumping if from a radium source

Who discovered this element? Friedrich Ernst Dorn

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Pictures of each element

What do these elements have in common?

All of these are gases.

Krypton and Xenon both have to do with photographic flash.

Neon and Argon both are used for light.

All of the elements are nonmetals.

All of them except helium have 8 valence electrons.