1.

Formulae for ortho-, pyro-, chain-, and double chain silicates are respectively:

Answer»

`[SiO_(4)]^(4-), [Si_2O_7]^(6-),[Si_2O_3]^(2-),[SiO_11]^(6-)`
`[SiO_(4)]^(4-), [Si_2O_7]^(6-),[SiO_3]^(2-),[Si_(4)O_11]^(6-)`
`[SiO_(4)]^(4-), [S_2iO_7]^(4-),[SiO_3]^(2-),[SiO_11]^(6-)`
`[SiO_(4)]^(4-), [Si_2O_6]^(6-),[SiO_3]^(2-),[SiO_11]^(6-)`

SOLUTION :`{:("Orthosilicate",-,"No oxygen is shared" ,SiO_(4)^(4-)),("Pyrosilicate",-,"Only one oxygen is shared",SiO_(7)^(6-)),("Chain silicate",-,"Two oxygen are shared",SiO_(3)^(2-)),("Chain silicate", -,"Two oxygen are shared",SiO_(3)^(2-)):}`


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