Real periodic table help

Jan 2020
1
0
Serbia
Im looking to make periodic table with real elements. I ran into a problem, how to imprison gases and make them visible in 5ml glass bottles
 
Sep 2018
70
17
England
All I can think of is to have the gas in a (clear) balloon inside the bottle.
Note that fluorine will react with glass (it will actually react with just about anything)
Helium is very hard to keep contained (it will happily seep through what would normally be considered "airtight" gaps).
Many elements (particularly gasses, and many metals) are visually very similar.
I assume that you will be stopping before you get to the radioactive elements...
 
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