The photo here depicts what happens when a coil of magnesium ribbon and a few calcium chips

Question:

The photo here depicts what happens when a coil of magnesium ribbon and a few calcium chips are placed in water.

(a) Based on these observations, what might you expect to see when barium, another Group 2A element, is placed in water?

(b) Give the period in which each element (Mg, Ca, and Ba) is found. What correlation do you think you might find between the reactivity of these elements and their positions in the periodic table? www Cengage Learning/Charles D. Winters Magnesium (left) and calcium (right) in water