chemistry - reactive metals exercises. Interpretation of data.

The above experiment was conducted by Irene. She was given 4 unknown metals("A", "B", "X" and "Y") and was asked to find the order of reactivity..
Observe the animation above.

Place the metals in order from most reactive to least reactive.
A bridge was constructed from huge beams made of metal "A". Bolts made of metal "Y" were used to secure the beams to each other. The bridge collapsed after 10 days. Explain why the bridge collapsed.

Reactivity exercises Making observations.
	Metal "X" was placed in a solution of metal "Y". Observe the animation on the left. Which is the more reactive metal?
Metal "A" was placed in a solution of metal "B". Observe the animation on the left. Which is the more reactive metal?
The above experiment was conducted by Irene. She was given 4 unknown metals("A", "B", "X" and "Y") and was asked to find the order of reactivity.. Observe the animation above. Place the metals in order from most reactive to least reactive. A bridge was constructed from huge beams made of metal "A". Bolts made of metal "Y" were used to secure the beams to each other. The bridge collapsed after 10 days. Explain why the bridge collapsed.