Question

List the metals Ni, Cu, Zn, Fe, Al, Mg, and hydrogen in order of deceeasing activity.

Answer 1

Metals are arranged in order of decreasing activity based on their reactivity with other substances. The more reactive a metal is, the higher it is on the activity series. Here is the list of the metals you provided in order of decreasing activity:

1. Hydrogen (H) - Hydrogen is a non-metal, but it is included in the activity series.

2. Lithium (Li) - Note that you didn't include Lithium in the list, but it is more reactive than all the other metals mentioned.

3. Potassium (K) - Also not mentioned in the list, but it is more reactive than the rest.

4. Sodium (Na) - Similarly, not listed but more reactive than the remaining metals.

5. Calcium (Ca) - Not mentioned, but it is more reactive than the following metals.

6. Magnesium (Mg) - More reactive than the metals below.

7. Aluminum (Al) - More reactive than the next metal.

8. Zinc (Zn) - More reactive than the following metals.

9. Iron (Fe) - More reactive than the metal below.

10. Nickel (Ni) - It is the least reactive among the listed metals.

11. Copper (Cu) - Copper is the least reactive metal among the listed ones.

So, the metals arranged in order of decreasing activity are: H, Li, K, Na, Ca, Mg, Al, Zn, Fe, Ni, Cu.