Question

If the number of Silicon atoms is restricted to $23$ only, what would be the number of oxygen atoms and magnitude of negative charges respectively in the structure of Pyroxene (single chain Silicate)?

• A. $70,48$
• B. $70,46$
• C. $23,48$
• D. $23,46$

Answer 1

Answer: (B)

$70,46$

Single chain silicates have general formula as $(Si{O}_3^{2-}{)}_n$

given, n= 23

therefore no. of oxygen atom = 3*23 = 69 = approx 70

As each unit has -2 charge

So, magnitude of charge = 2*23 = 46