c3 patterns of behaviour - noble gases
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No Slide TitleGroup 0 the noble gases
Coming after Group 7, you might expect these to be called Group 8 – and in some books they are.
Group 0 is a better name though – because that’s what they do!
H
Li
Na
K
Rb
Cs
Fr
Be
Sc
Ti
Mg
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
Se
Br
Ca
Kr
Y
Zr
Nb
Mo
Tc
Ru
Pd
Ag
Cd
In
Sn
Sb
Sr
Te
Rh
Ba
Hf
Ta
W
Re
Os
Ir
Au
Hg
Tl
Pb
Bi
Po
La
At
Pt
Ra
Rf
Db
Sg
Bh
Hs
Mt
Electron Structure and Reactivity
All the elements in this group have fully occupied outer shells.
They are the least chemically reactive elements. The stable arrangement means that the noble gases do not form chemical bonds with each other or other elements.
They are monatomic which means they exist as individual atoms.
2
2,8
2,8,8
Ar
Ne
He
Uses of Noble Gases
You might think that a group of elements that have almost no reactions would have few uses.
You would be wrong! They have many uses, mostly based upon their ability to prevent other (undesirable) reactions taking place.
7.unknown
Protective gas for growing silicon crystals in silicon chip manufacture.
Rare documents preservation (i.e. US Declaration of Independence).
Pressurizing agent for liquid fuel rockets (inert so won't react).
Coolant for the super-conductors used in body scanners.
8.unknown
TV tubes.
Neon lasers.
© Boardworks Ltd 2003
Uses of Argon
Used to fill light bulbs because the filament will not react with argon.
Used as an inert gas shield for arc welding and cutting especially metals easily damaged by oxygen such as aluminium & stainless steel.
Argon is involved in dating the ages of rocks by potassium-argon dating.
10.unknown
Ne
Ar
He
Patterns: Density!
There can be few chemical patterns for a group as unreactive as this.
There are still trends in physical properties
© Boardworks Ltd 2003
Can you predict the B.Pts of Kr Xe and Rn?
© Boardworks Ltd 2003
Which is NOT a true statement about the noble gases?
They contain shells that are full or empty
They are monatomic gases
© Boardworks Ltd 2003
Helium
Neon
Argon
Krypton
Helium
Neon
Argon
Krypton
Helium
Neon
Argon
Krypton
inert gas during arc welding of metals like
aluminium?
Helium
Neon
Argon
Krypton
-269
-246
-186
-152
-108
-62
-300-200-1000
Coming after Group 7, you might expect these to be called Group 8 – and in some books they are.
Group 0 is a better name though – because that’s what they do!
H
Li
Na
K
Rb
Cs
Fr
Be
Sc
Ti
Mg
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
Se
Br
Ca
Kr
Y
Zr
Nb
Mo
Tc
Ru
Pd
Ag
Cd
In
Sn
Sb
Sr
Te
Rh
Ba
Hf
Ta
W
Re
Os
Ir
Au
Hg
Tl
Pb
Bi
Po
La
At
Pt
Ra
Rf
Db
Sg
Bh
Hs
Mt
Electron Structure and Reactivity
All the elements in this group have fully occupied outer shells.
They are the least chemically reactive elements. The stable arrangement means that the noble gases do not form chemical bonds with each other or other elements.
They are monatomic which means they exist as individual atoms.
2
2,8
2,8,8
Ar
Ne
He
Uses of Noble Gases
You might think that a group of elements that have almost no reactions would have few uses.
You would be wrong! They have many uses, mostly based upon their ability to prevent other (undesirable) reactions taking place.
7.unknown
Protective gas for growing silicon crystals in silicon chip manufacture.
Rare documents preservation (i.e. US Declaration of Independence).
Pressurizing agent for liquid fuel rockets (inert so won't react).
Coolant for the super-conductors used in body scanners.
8.unknown
TV tubes.
Neon lasers.
© Boardworks Ltd 2003
Uses of Argon
Used to fill light bulbs because the filament will not react with argon.
Used as an inert gas shield for arc welding and cutting especially metals easily damaged by oxygen such as aluminium & stainless steel.
Argon is involved in dating the ages of rocks by potassium-argon dating.
10.unknown
Ne
Ar
He
Patterns: Density!
There can be few chemical patterns for a group as unreactive as this.
There are still trends in physical properties
© Boardworks Ltd 2003
Can you predict the B.Pts of Kr Xe and Rn?
© Boardworks Ltd 2003
Which is NOT a true statement about the noble gases?
They contain shells that are full or empty
They are monatomic gases
© Boardworks Ltd 2003
Helium
Neon
Argon
Krypton
Helium
Neon
Argon
Krypton
Helium
Neon
Argon
Krypton
inert gas during arc welding of metals like
aluminium?
Helium
Neon
Argon
Krypton
-269
-246
-186
-152
-108
-62
-300-200-1000