Four.
Quartz is rich in the element silicon. It is composed of silicon dioxide (SiO2).
The compound silicon monoxide (SiO) has only two atoms; one silicon atom, one oxygen. The prefix "mono" tells you there is only one oxygen attached; "bi" or "di" (such as in silicon dioxide) would tell you there are two oxygens (for total of three, in that example).
Silicon dioxide is composed of silicon and oxygen atoms in a 1:2 ratio. It is a common mineral found in many forms, including quartz and sand.
2
Four.
4
Quartz is rich in the element silicon. It is composed of silicon dioxide (SiO2).
SiO2 is a macromolecule. Each silicon atom is covalently bonded to four oxygen atoms and each oxygen atom is covalently bonded to two silicon atoms.
Silicon dioxide is a molecule made of one silicon and two oxygen for a total of three atoms.
Silicon dioxide is composed of silicon and oxygen atoms in a 1:2 ratio. It is a common mineral found in many forms, including quartz and sand.
2
The molecular formula for silicon dioxide is SiO2, so there are a total of three atoms; one silicon atom, and two oxygen atoms.
The chemical formula of Silicon dioxide is SiO2. Two oxygen atoms are bond to a silicon atom. This compound has 3 atoms per molecule.
Well take Si (as its own element, being silicon) and see how many atoms it has in that one unit, which would be 1 (notice that it has no number next to it) then see how many atoms are in the O2 (Oxygen) obviously it has 2 because of the number next to it. So you take the two numbers and add. 2+1=3. 3 atoms are present.
c. 4
In Si2O, silicon usually forms 4 covalent bonds and oxygen forms 2 covalent bonds. Therefore, for Si2O, there are usually two non-bonding pairs on each oxygen atom, resulting in a total of four non-bonding pairs in the molecule.