Naphthalene is a fused bicyclic aromatic molecule. The shared atoms and bond that cause the molecule to be fused are shown in red.
Bicyclo[2.2.1]heptane is a bridged bicyclic molecule.
Spiro[2.3]hexane is a spiro bicyclic molecule.
(2) A substance that has been melted, then
allowed to solidify.
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+ |
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+ |
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| Silica |
Boron trioxide |
Soda ash |
Lime |
A Pyrex glass beaker |
Borosilicate
(Pyrex) glass used in most laboratory glassware is
manufactured by fusing silica (SiO2; essentially
highly purified sand), boron trioxide (B2O3),
soda ash (sodium carbonate;
Na2CO3), and lime (calcium oxide; CaO)
at high temperature, then allowing this melt to cool and
solidify.