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Noble gases
By Bethany Cunningham and Sarah McCormack…read more

Slide 2

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What are noble gases?
They are a group of chemical elements with very similar
properties: under standard conditions, they are all
odourless, colourless, monatomic gases, with very low
chemical reactivity.
Their outer electrons are full and therefore very un reactive.
Also their melting and boiling points are very similar usually
only differing 10°C.
0.02% of the Earth's atmosphere is noble gases…read more

Slide 3

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Helium 0
Atomic number of 2
Lowest boiling and melting points of the noble gases
24% of the elemental mass in our galaxy
4.002602 is the approximate mass
It is used in cryogenics particularly in cooling of superconducting
The most popular function of Helium is lifting balloons and airships
First discovered in 1868 as a bright yellow line in a wavelength
Least reactive of the noble gases
Eight types isotopes of Helium
Used as a productive gas in growing silicon and geranium crystals
Industrial application for Helium is leak detection…read more

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Neon 0
Atomic number of 10
Very common element in the universe but very rare on Earth
Gives a distinct reddish-orange glow in a vacuum discharge tube
Used in low voltage glow lamps and in high voltage discharge tubes
or neon advertising signs
20.1797 is the approximate mass
Second lightest inert gas
Stable forms are produced by stars
Three stable isotopes
Contains only 0.0018 percent Neon in dry air
Fifth most abundant chemical element in the universe by mass
It is created in fusing helium and oxygen in the alpha process,…read more

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Argon 0
Most abundant noble gas
Found first out of the noble gases
Atomic number 18
Third most common gas in the Earth's atmosphere at 0.93%,
more common than Carbon Dioxide
Produced industrially by fractional distillation
Translated from the Greek word meaning `inactive one/'lazy' as it
undergoes almost no chemical reactions
Argon constitutes 0.934% by volume and 1.28% by mass of the
Earth's atmosphere
Argon has many uses but the main one is to displace oxygen and
moisture containing air in packaging material to extend shelf-lives.…read more

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Kry 0
Atomic number of 36
Krypton was discovered in
Britain in 1898
Characterised by several sharp
emission lines
There is six stable isotopes that
occur naturally
Krypton's concentration in the
atmosphere is about 1 part per
It can be extracted from liquid air
by fractional distillation
The approximate mass is 83.80…read more

Slide 7

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Slide 8

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Bethany Cunningham


Hope people find this interesting, it can help with GCSE AQA chemistry.

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