Question

why hydrogen is included in the metal reactivity series

Answer 1

Non-metals in the reactivity series. It is useful to place carbon and hydrogen into thereactivity series because these elements can be used to extract metals. Here is thereactivity series including carbon and hydrogen: ... However, copper can be extracted using carbon or hydrogen.

Answer 2

Answer:

Hydrogen, being a non-metal is included in the reactivity series of metals because it shows the property of metals to form positive ion of itself by losing electron.

Explanation:

In chemical terms, we define metals as those elements who form positive ions by losing electrons(elements form positive ion if they lose electrons as the net charge of the  protons and the electrons will the positive and vice versa) and non-metals form negative ions by gaining electrons. Hydrogen is the exception in this case as it loses electron to form positive hydrogen ion. As hydrogen shows the chemical property of metals. It is included in the reactivity series of metals.