alkalimetalli
Alkalimetalli are the chemical elements in Group 1 of the periodic table, excluding hydrogen. These elements are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). They are characterized by having a single valence electron, which they readily lose to form a cation with a +1 charge. This high reactivity makes them excellent reducing agents.
Alkalimetalli are soft, low-density metals with low melting and boiling points. They are highly lustrous when
Sodium and potassium are particularly abundant and play crucial roles in biological systems, such as nerve