Question

4 multiple choice 1 point li select the correct electron configuration for the species shown above. 1s² 2s² 1s² 2s¹ 1s¹ 1s²

Explanation:

Lithium (Li) has an atomic number of 3, meaning it has 3 electrons. Electrons fill orbitals in order of increasing energy. The 1s orbital can hold 2 electrons and the 2s orbital can hold 2 electrons. So, the electron - configuration for Li is 1s²2s¹.

Answer:

B. 1s² 2s¹