What is the valence electron configuration for the beryllium atom?
Answer: The valence electron configuration for the beryllium atom is 2s2.
Explanation: Valence electrons are the electrons present in the outermost energy level (shell) of an atom. Beryllium (Be), with an atomic number of 4, has an electron configuration of 1s2 2s2. In this configuration, the 2s subshell contains the valence electrons. Beryllium has 2 valence electrons in total.