How many valence electrons does beryllium have?
Answer: Beryllium (Be) has 2 valence electrons.
Explanation: Valence electrons are the electrons present in the outermost energy level (shell) of an atom. Beryllium, 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. Read More…