Final answer:
The correct electron configuration among the options is b. Cl, 1s²2s²2p¶3s²3pµ5, which represents the electron configuration for chlorine (Cl). Options a. and c. incorrectly place electrons in the 4d and 3d orbitals, respectively, for scandium (Sc) and calcium (Ca).
Step-by-step explanation:
The question concerns determining which of the given electron configurations is correct for the specified elements. Knowing the correct electron configurations is essential for understanding the properties of elements and their chemical behavior.
For scandium (Sc), the correct configuration is 1s22s22p63s23p63d14s2. This means that option a. Sc, 1s22s22p63s23p64d14s2 is incorrect because the 3d subshell fills before the 4s, not the 4d.
For chlorine (Cl), the correct configuration is 1s22s22p63s23p5, so option b. Cl, 1s22s22p63s23p5 is correct.
For calcium (Ca), the electron configuration should be 1s22s22p63s23p64s2, which means that c. Ca, 1s22s22p63s23p63d2 is incorrect because calcium does not have electrons in its 3d sublevel.