This question is about Group 1 elements.
Give two observations you could make when a small piece of sodium is added to water.
Complete and balance the equation for the reaction of sodium with water: Na+H2O→‾+‾\text{Na} + \text{H}_2\text{O} \rightarrow \underline{\quad\quad\quad} + \underline{\quad\quad\quad}Na+H2O→+
Explain why the reactivity of elements increases going down Group 1.
Lithium reacts with oxygen to produce the ionic compound lithium oxide.
Describe, in terms of electron transfer, what happens when atoms of lithium and oxygen react to produce lithium oxide Li2O\text{Li}_2\text{O}Li2O. State the charges on the ions formed.
Why is oxygen described as being reduced in the reaction between lithium and oxygen?
Explain why lithium oxide has a high melting point.