Cobalt (Co)

Practice

Practice cobalt

Questions from the course about cobalt. If you’re signed in, your answers count toward your progress.

1. Question 1Ground-state electron configurationExam level

   Which is the ground-state electron configuration of a neutral cobalt atom ($\ce{Co}$)?

   A$[\mathrm{Ar}]\,4s^{2}\,3d^{6}$B$[\mathrm{Ar}]\,4s^{2}\,3d^{7}$C$[\mathrm{Ar}]\,4s^{2}\,3d^{8}$D$[\mathrm{Ar}]\,3d^{9}$

   CheckDifferent question

2. Question 2Electron configuration of an ionExam level

   Which is the ground-state electron configuration of $\ce{Co^2+}$?

   A$[\mathrm{Ar}]\,4s^{2}\,3d^{7}$B$[\mathrm{Ar}]\,4s^{2}\,3d^{5}$C$[\mathrm{Ar}]\,4s^{2}\,3d^{9}$D$[\mathrm{Ar}]\,3d^{7}$

   CheckDifferent question

3. Question 3Fill an atomic orbital diagramExam level

   Complete the orbital diagram for the valence electrons of a ground-state cobalt atom ($\ce{Co}$). Only the 4s and 3d subshells are shown; the [Ar] core is full and not drawn. Obey the Pauli principle and Hund's rule.

   Tap places

   ↑spin up↓spin down

   Tap a box: empty → ↑ → ↑↓ → empty. Long-press, right-click or press M for a menu; D adds a ↓, U adds a ↑, Delete empties; arrow keys move between boxes.

   ▲Energy

   $3d$

   $4s$

   0 electrons placed

   CheckDifferent question