Which of the following is the correct electron configuration for copper?
  1. [Ar] 4s23d9
  2. [Ar] 4s13d10
  3. [Ar] 3s23d9
  4. [Ar] 3s13d10
  5. [Kr] 4s23d9
Explanation
Answer: [Ar] 4s13d10

To write the abbreviated electron configuration for an element, begin with the noble gas in the period directly above that element. Then, account for the s-block, d-block, and p-block valence electrons. Copper has no p-block valence electrons, so in this question one must only consider s-block and d-block electrons. However, copper is one of several elements that allows one electron from the s-orbital to be held in the d-orbital. Thus, the correct electron configuration for copper is [Ar]4s13d10.
Was this helpful? Upvote!
Login to contribute your own answer or details

Top questions

Related questions

Most popular on PracticeQuiz