Skip to content

Menu

Game modes

Account

← Structure of Atom
GK QUESTION#3160

The correct electronic configuration of Cu is:

  1. A[Ar]3d⁹4s²
  2. B[Kr]3d⁹4s²
  3. C[Kr]3d¹⁰4s¹
  4. D[Ar]3d¹⁰4s¹Correct answer
Show AnswerHide Answer

Answer

D. [Ar]3d¹⁰4s¹

Show ExplanationHide Explanation

Explanation

The ground-state configuration of neutral copper, atomic number 29, is [Ar]3d¹⁰4s¹. The filled 3d subshell is important to this configuration. A krypton core already contains 36 electrons and cannot represent neutral copper.

Sign in to report a question issue

Explore this topic

Under ordinary room conditions, which listed metal has the greatest tabulated density?Which listed scientist gave the element oxygen its name?Ferrum is the Latin name for ___.