Group 18 Elements: Noble Gases
Quinten Prince and Dylan Prevette
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 JanssenNeon
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 gases
. They are all nonmetal
. They all have the same 8 Valence Electrons except for Helium