Question #1. Place the metals: Pb, Ag, Zn, Cu and Mg in order of decreasing activity, most active first. Question #2. Why can you not place Hydrogen in its proper place in this order using the above information. Question #3. What test (metal and salt or acid) would you still need to do to place Hydrogen where it belongs in the activity order. There is no need to send me a photo, just email me your answers.