Question

why is the position assigning to hydrogen in the periodic table considered Anomalous​

Answer 1

Answer:

because it has alkali earthmetals and nonmetals properties

Answer 2

Hydrogen's valency (1) is similar to both the 1st group and the 17th group.

There is an anomaly when it comes to the position of hydrogen in the periodic table because, it can either be placed in the 1st group or the 17th group. It shows properties of both. Hydrogen can either lose one electron like the alkali metals in the 1st group or gain one like the halogens in the 17th group.