one atom of silicon can properly be combined in a compound with

A. one atom of chlorine
B. two atoms of oxygen
C. three atoms of hydrogen
D. four atoms of calcium

B. two atoms of oxygen
(as in SiO2.. quartz and sand)

Ther is also a compound SiO. It is used for optical coatings.

One atom of silicon can properly be combined in a compound with
A. one atom of chorine
B. two atoms of oxygen
C. three atoms of hydrogen
D. four atoms of calcium

one aton of chlorine