State two physical properties of sodium that are unlike those of most other metals.
Complete the electronic configuration for a sodium atom. Include every electron.
The equation describes sodium reacting with water. $\text{2Na(s)} + \text{2H}_2\text{O(l)} \rightarrow \text{2NaOH(aq)} + \text{H}_2\text{(g)}$ Calculate the smallest mass of sodium, in grams, required to make $300\,\text{cm}^3$ of hydrogen gas at room temperature and pressure. Give your answer to three significant figures.
Sodium reacts with oxygen to make the ionic solid sodium oxide, $\text{Na}_2\text{O}$. Explain, in terms of electron movement, how $\text{Na}_2\text{O}$ is formed when sodium reacts with oxygen.
Suggest one further physical property of sodium chloride.
State the products at the anode and cathode during the electrolysis of concentrated aqueous sodium chloride.
Describe one test for chloride ions.