Question

Why is hydrogen placed in group one?

Answer 1

Hydrogen:

• The chemical element hydrogen has the symbol $\mathrm{H}$ and the atomic number $1$.
• It is one of the universe's most abundant chemical substances.
• Hydrogen(H) is in group I of the modern periodic table.

Position of hydrogen in the periodic table:

• Hydrogen is placed in group one because it has certain properties of group I elements.
• Hydrogen, like other alkali metals, is a powerful reducing agent.
• Hydrogen has an outer electronic configuration $1s^1$ that is comparable with those of group I elements.
• Hydrogen rapidly loses an electron to create the hydrogen ion, similar to group I elements' electropositive nature.
• Hydrogen combines electronegative elements to generate binary compounds resembling group I elements.