Explain why nitrogen gas, $\text{N}_2(g)$, is not very reactive.
Covalent bonds may be $\sigma$ bonds or $\pi$ bonds. Complete Table 1.1 to show how many $\sigma$ and $\pi$ bonds are present in a molecule of $\text{N}_2$, and to describe the orbital overlap that forms $\sigma$ and $\pi$ bonds.
A sample of $\text{Al}$ is reacted with excess $\text{Cl}_2$. State the oxidation number of $\text{Al}$ in the product formed.
State what determines the highest oxidation number of the Period 3 elements in their oxides.
Separate samples of aluminium oxide, $\text{Al}_2\text{O}_3$, and phosphorus(V) oxide, $\text{P}_4\text{O}_{10}$, are each reacted with excess $\text{NaOH}(aq)$ at room temperature. Give the state of $\text{Al}_2\text{O}_3$ and $\text{P}_4\text{O}_{10}$ at room temperature.
Write an equation for the reaction of each oxide with excess $\text{NaOH}(aq)$ at room temperature.
The oxide of silicon reacts with calcium oxide in an addition reaction to make calcium silicate, $\text{CaSiO}_3$. The oxidation number of calcium in $\text{CaSiO}_3$ is $+\text{II}$. Deduce the oxidation number of silicon in calcium silicate.
Calcium oxide can be obtained from calcium carbonate in a single-step reaction. Identify the type of reaction that takes place.