Group 18 Elements: Noble Gases

Quinten Prince and Dylan Prevette

Group 18 Picture

Helium

Neon

Argon

Krypton

Xenon

Radon

Helium

Name of element Helium

Symbol of element He

Atomic Number of element 2

Atomic Mass of element 4.003

How many valence electrons does this element have 2

What are the uses for this element? As an inert gas shielding for arc welding

Who discovered this element? Jules Cesar Janssen

Neon

Name of element: Neon

Symbol of element: Ne

Atomic Number of element: 10

Atomic Mass of element: 20.2

How many valence electrons does this element have? 8

What are the uses for this element? indicators ,lasers ,cryogenic

Who discovered this element? Morris travers , William Ramsay

Argon

Name of element Argon

Symbol of element Ar

Atomic Number of element 18

Atomic Mass of element 39.948

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


Who discovered this element? Lord Raleigh and Sir William Ramsey

Krypton

Name of element: Krypton

Symbol of element: Kr

Atomic Number of element : 36

Atomic Mass of element: 84

How many valence electrons does this element have? 8

What are the uses for this element? speed photography

Who discovered this element? Morris travers , william ramsay


Xenon

Name of element Xenon

Symbol of element Xe

Atomic Number of element 54

Atomic Mass of element 131.29

How many valence electrons does this element have? 8

What are the uses for this element? Electron tubes, stoboscopic lamps, bactericidal lamps, and lamps used to excite ruby lasers that generate coherent light

Who discovered this element? Ramsay and Travers

Radon

Name of element Radon

Symbol of element Rn

Atomic Number of element 86

Atomic Mass of element 222

How many valence electrons does this element have? 8

What are the uses for this element? therapeutic use by a few hospitals by pumping it from a radium source and sealing it in minute tubes called seeds or needles

Who discovered this element? Ramsay and Gray


Things They All Have In Common

. They are all in the 18 group on the periodic table.

. They are all gases

. They are all nonmetal

. They all have the same 8 Valence Electrons except for Helium