Which element acts as strong reducing agent?

Reducing agent:

• The reducing agent is the chemical species that is oxidized or undergoes oxidation.

The element that acts as a strong reducing agent:

• The strongest reducing agent is $\mathrm{Na}$.
• During a redox process, a reducer releases electrons to other compounds and is oxidized to the highest valency state.
• A tendency to give electrons away is done by reducing agents.
• The metals in the s-block are effective reducing agents.
• The good reducing agents have low electronegativity atoms and an actual capacity of a molecule to draw in bonding electrons, resulting in compounds with low ionization energies.
• Alkali metals are good reducing agents.