How many energy levels does beryllium have?
Answer: Beryllium (Be) has 2 energy levels.
Explanation: Energy levels, also known as electron shells, are regions around an atomic nucleus where electrons are found. Beryllium, with an atomic number of 4, has an electron configuration of 1s2 2s2. In this configuration, the first energy level (shell) is fully occupied with 2 electrons in the 1s subshell, and the second energy level (shell) contains the remaining 2 electrons in the 2s subshell. Read More…