which is the electron configuration for lithium?\n1s²\n2s³\n1s²2s¹\n1s¹2s²
which is the electron configuration for lithium?\n1s²\n2s³\n1s²2s¹\n1s¹2s²
Answer
Brief Explanations:
Lithium has an atomic number of 3, meaning it has 3 electrons. Electrons fill the 1s orbital first (which can hold 2 electrons), and then the 2s orbital (which holds the remaining 1 electron). So the electron - configuration is $1s^{2}2s^{1}$.
Answer:
1s²2s¹ (the third option)