Fluorine-18
Fluorine is a univalent poisonous gaseous halogen. It is pale yellow-green and it is the most chemically reactive and electronegative of all the elements. Fluorine readily forms compounds with most other elements – even with the noble gases krypton, xenon and radon. It is so reactive that glass, metals, and even water, as well as other substances, burn with a bright flame in a jet of fluorine gas. In aqueous solution, fluorine commonly occurs as the fluoride ion F-. Fluorides are compounds that combine fluoride with some positively charged counterpart.
Applications
Atomic fluorine and molecular fluorine are used for plasma etching in semiconductor manufacturing, flat panel display production and MEMs fabrication. Fluorine is indirectly used in the production of low friction plastics such as teflon and in halons such as freon, in the production of uranium. Fluorochlorohydrocarbons are used extensively in air conditioning and in refrigeration. Fluorides are often added to toothpaste and, somewhat controversially, to municipal water supplies to prevent dental cavities.
Podcasts:
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by Leona Lewis
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by Catatonia
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by Beaten Back To Pure
Fly Here Now
by: Leona LewisDoesn't matter what you say
Just tell me what would you do
When I miss you like this baby
Gotta teleport your molecules
give you wings so you can fly
Hi-i-i-i-igh
I'd give you wings so you could fly to me across the sky
I'm tired of talking baby
Say yes or no not maybe
I need your body here with me
(I need your body here with me)
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
There's nothing there to hold you down
there's nobody that's strong enough
Aren't you tired of living on the ground
Well tonight we're going to live it up
Take a trip across the sky
Hi-i-i-i-igh
Spread your wings and fly
This aint a hard decision
Your stronger than jet engines
There's no excuse for you to be
there's no excuse for you to be so far from me
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
People say that we
We can't fly
But we can defy
Gravity tonight we'll fly
People say that we
We can't fly
But we can defy
Gravity
If we can just do something crazy
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
This might sound crazy but
Just fly here right now
Glide like an airplane and