What is similar about the valence electrons for atoms of elements in period 2?

Atoms of elements in period 2 of the Periodic Table all have four valence electrons in their outermost shell, which is the second energy level. This period includes elements from lithium (Li) to neon (Ne), and they exhibit similar chemical properties due to their electron configurations. The number of valence electrons influences their reactivity and bonding behavior, making them more likely to form covalent bonds. Overall, the similarity in valence electrons contributes to the trends in chemical properties observed in this period.