6 multiple choice 1 point li + select the correct electron configuration for the species shown above. 1s²…
6 multiple choice 1 point li + select the correct electron configuration for the species shown above. 1s² 2s¹ 1s¹ 1s² 2s² 1s²
Answer
Answer:
D. $1s^{2}$
Explanation:
Step1: Recall lithium's atomic number
Lithium (Li) has an atomic number of 3, so neutral Li has 3 electrons.
Step2: Consider the ion state
$Li^{+}$ has lost 1 electron. So it has 2 electrons.
Step3: Determine electron - configuration
The first energy level (n = 1) can hold 2 electrons in the 1s orbital. So the electron - configuration of $Li^{+}$ is $1s^{2}$.