Hydrogen is placed in the alkali metals group primarily because hydrogen has 1 valence electron. This similar electronic configuration allows hydrogen to exhibit some characteristics akin to the alkali metals, such as forming cations (H⁺) and participating in similar chemical reactions. However, it is important to note that hydrogen behaves very differently from the alkali metals in many respects, which is why it is often considered an anomaly in the periodic table.
The modern periodic table arranges elements by their increasing atomic number. This
results in elements with similar properties in groups on the periodic table. Hydrogen,
however, is an anomaly because it does not share properties with other elements in the
alkali metals group.
Why is hydrogen placed in this group?
(1 point)
Hydrogen has 1 valence electron.
Hydrogen forms hydroxides when it reacts with water.
Hydrogen forms strong acids.
1 answer