Zinc (Zn)

Practice

Practice zinc

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

1. Question 1Photoelectric effect: kinetic energy of ejected electronsExam level

   Light of wavelength $231\ \mathrm{nm}$ shines on a clean zinc surface. The work function of zinc is $\phi = 4.33\ \mathrm{eV}$ ($1\ \mathrm{eV} = 1.602 \times 10^{-19}\ \mathrm{J}$). What is the maximum kinetic energy of the ejected electrons, in eV?

   Your answer (in the unit shown)

   $\mathrm{eV}$

   Scientific notation: type 4.86e-7 or 4.86 x 10^-7.

   CheckDifferent question

2. Question 2Ground-state electron configurationExam level

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

   A$[\mathrm{Ar}]\,4s^{2}\,3d^{10}\,4p^{2}$B$[\mathrm{Ar}]\,4s^{2}\,3d^{10}$C$[\mathrm{Ar}]\,4s^{1}\,3d^{10}$D$[\mathrm{Ar}]\,4s^{2}\,3d^{10}\,4p^{1}$

   CheckDifferent question

3. Question 3Electron configuration of an ionExam level

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

   A$[\mathrm{Ar}]\,4s^{2}\,3d^{8}$B$[\mathrm{Ar}]\,4s^{2}\,3d^{10}\,4p^{2}$C$[\mathrm{Ar}]\,3d^{10}$D$[\mathrm{Ar}]\,4s^{2}\,3d^{10}$

   CheckDifferent question