Question

explain the position of hydrogen in a periodic table​

Answer 1

Explanation:

Hydrogen is the first element of the periodic table & often called protium. Its electronic configuration is [1s

1

]. Due to the presence of only one electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it resembles both alkali metals and halogens.

As a result it is placed at the top of the alkali metals in group 1 & also along the halogens in group 17 since just like halogens,it also requires any one electron to have the configuration of the nearest noble gas element.

Answer 2

Answer:

● Hydrogen is the first element of the periodic table & often called protium. Its electronic configuration is $[1{s}^1].$ Due to the presence of only one electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it resembles both alkali metals and halogens.

● As a result it is placed at the top of the alkali metals in group 1 & also along the halogens in group 17 since just like halogens,it also requires any one electron to have the configuration of the nearest noble gas element.