Alkali metals are found in Group 1 of the periodic table, which includes elements such as lithium (Li), sodium (Na), potassium (K), and so on. Alkali metals have one valence electron in their outermost energy level.
To obtain a full valence energy level, alkali metals need to lose one electron. By losing this single valence electron, they achieve a stable electron configuration that resembles the previous noble gas element in the periodic table. This process results in the formation of a positively charged ion with a 1+ charge.