different between freons vs preons

freons

freons From the web:

• what are freons in chemistry
• what are freons in chemistry class 12
• what are freons give an example
• what are freons and teflon
• what are freons discuss their uses
• what are freons give its uses
• what are freons

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preons

preons From the web:

• what prions
• what prions do
• what's prions disease
• what are preons made of
• prions deer
• what makes prions
• what do prions do
• what's smaller than preons