Reactions of Period 3 with Water and Oxygen

Question 1

What are the only elements in period 3 that react with water?

Answer 1

Sodium and Magnesium

Question 2

Sodium reaction with water

Answer 2

Reacts vigorously, fizzes rapidly and melts due to the heat given out and floats on the surface. Forms a strongly alkaline solution.
2Na(s) + 2H2O(l) –> 2Naoh(aq) + H2(g)