Only larger members of the group that are chemically active in are 1A group(s) of the periodic table.
The periodic table's alkali metals are classified as Group 1A (or IA) elements and include hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). These are soft, glossy, low-melting, extremely reactive metals that tarnish when exposed to air, with the exception of hydrogen.
The periodic table's alkali metals are classified as Group 1A (or IA) elements and include hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). These are soft, glossy, low-melting, chemically active metals that tarnish when exposed to air, with the exception of hydrogen. One of the chemically active metals is the alkali metal. They have greater atomic radii and low ionization energies, which contribute to this. They having an oxidation state of +1, tend to give electrons in reactions.
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