How do you write the electron configuration for lithium?
Answer: The electron configuration for lithium is 1s2 2s1.
Explanation: The electron configuration represents the arrangement of electrons in the energy levels (shells) and subshells of an atom. Lithium (Li), with an atomic number of 3, has three electrons. According to the Aufbau principle, electrons fill the lowest energy levels first. In lithium’s case, the first two electrons occupy the 1s subshell, and the third electron goes into the 2s subshell. Read more…