Question

hydrogen is a non metal then also it is in reactivity series table how

Answer 1

because it also has a valency of 1 like that of sodium and lithium and can form positive ions like them so they are placed in group 1 of the table

Answer 2

HELLO FRIEND!

The first and the foremost characteristic of a metal is that, it is a good reducing agent as it easily loses electron(s) to form cations (positively charged ions).

Hydrogen, despite being a non metal, forms a positively charged ion. It has only one valence electron, which it loses and thus forms a cation. Its valency thus is +1.
Hydrogen is also a good reducing agent.

Example: PbO + H₂ ----> Pb + H₂O

Thus, hydrogen is placed in the metal reactivity series.
THANKS (^_^)....