1.

What is the chemical formula of beryl?

A. Be<sub>3</sub>Al<sub>2</sub>Si<sub>6</sub>O<sub>18</sub>
B. Be<sub>3</sub>AlSi<sub>6</sub>O<sub>18</sub>
C. Be<sub>3</sub>Al<sub>2</sub>Si<sub>6</sub>O
D. BeAl<sub>2</sub>Si<sub>6</sub>O<sub>18</sub>
Answer» B. Be<sub>3</sub>AlSi<sub>6</sub>O<sub>18</sub>


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