Use only these terms to complete the table describing the oxides of the third-period elements from sodium to sulfur. The oxides are $\text{Na}_2\text{O}$, $\text{MgO}$, $\text{Al}_2\text{O}_3$, $\text{SiO}_2$, $\text{P}_4\text{O}_{10}$, $\text{SO}_2$, $\text{Cl}_2\text{O}_7$.
Give the names of two elements from sodium to chlorine which can form more than one oxide.
Describe, as completely as possible, what you would observe if a piece of sodium were reacted with water.
Write an equation for sodium reacting with water.
State one way by which sulfur dioxide enters the atmosphere.
Give the formula for another sulfur compound produced in the atmosphere from sulfur dioxide.
What environmental effects does the compound you identified in (ii) have?
Sulfur dioxide is used as a food preservative. What is it about sulfur dioxide that allows it to work in this way?
Draw a dot-and-cross diagram for the OCS molecule, showing only the outer electrons. The atoms are arranged oxygen-carbon-sulfur, and the molecule is not cyclic.
Suggest the value of the O-C-S bond angle.