Hydrogen Placed first in Periodic Table: Periodic Tables are used for various professional purposes. Hydrogen is an important element in the periodic table. As per the periodic table, H2 doesn’t have a fixed position, but mainly it places first in the periodic table. There are many reasons that hydrogen is placed first in the periodic table.
Hydrogen Placed first in Periodic Table
Let’s have a look at why hydrogen placed first in the periodic table.
- It shows outer electronic configuration similar to group elements (i.e.1s1)
- H2 readily loses its electron to form H+ion which resembles the electropositive character of group I elements.
- The Hydrogen shows +1 oxidation state like alkali i.e. group I elements.
- Hydrogen also acts as a reducing agent like alkali metals and also forms binary compounds with electronegative elements that resembles the group I elements.
The H2 is a chemical element which has symbol H and atomic number 1. Hydrogen also resembles alkali metals in electronic configuration. Hydrogen atoms has the re-configuration 1st and is the first element to place as per the rule. It places with alkali metals because sit can loose its one e- to form H + just like the alkali metals.
Hydrogen also resembles halogens. Alkali metals form hydrides like NaH and LiH just similar to NaCI and LiCI. The electrolysis of hydrides gives H2 and the electrolysis of NaCI yield C12. Hydrogen can receive one electron like halogens to create noble gas configuration (H-).
The standard atomic weight of Hydrogen is 1.008 and It is the lightest element in the periodic table. H2, which is the most abundant chemical substance, constituting roughly 75% of all baryonic mass.
The periodic table knows as the periodic table of elements is a tabular display of the chemical elements, which arrange by atomic number, electron configuration, and recurring chemical properties.