This question is about Group 1 elements.
Give two observations you could make when a small piece of potassium is added to water.
Complete and balance the equation for the reaction of potassium with water: K+H2O→‾+‾\text{K} + \text{H}_2\text{O} \rightarrow \underline{\quad\quad\quad} + \underline{\quad\quad\quad}K+H2O→+
Explain why the reactivity of elements increases going down Group 1.
Sodium reacts with sulfur to produce the ionic compound sodium sulfide.
Describe, in terms of electron transfer, what happens when atoms of sodium and sulfur react to produce sodium sulfide Na2S\text{Na}_2\text{S}Na2S. State the charges on the ions formed.
Why is sulfur described as being reduced in the reaction between sodium and sulfur?
Explain why sodium sulfide has a high melting point.