Which of the following is the condensed electron configuration for hafnium (Z = 72)?  Hafnium follows the order of filling orbitals used to derive ground-state electron configurations.

Which of the following ground state electron configurations is/are incorrect? OPt = Xe 6s2 4f 14 5d OCu = Ar 4s2 3d° OGa = [Ar| 4s2 3d10 4p! Sn = Kr] 5s2 4d10 5p² OMn = Ar 4s2 3d5

3. The following energy levels were recorded for a sodium atom: Orbital Energy -8.235 x 10-19 J -4.870 x 10-19J 3s 3p Calculate the energy of a photon needed to cause an electron in the 3s orbital to be excited to the 3p orbital.

Which orbital notation represents a boron atom in the ground state?

Is ionization energy a periodic property because ground-state electron configuration is a periodic property?

Sketch the following atomic orbitals in 2 dimension.    s  px py pz

What are the key differences in (a) energy and (b) location of electron density between a 2s orbital and a 2px orbital. Maybe a diagram to help?

This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI prefix 'zepto' means 10-21. You can find the meaning of any SI prefix in the ALEKS Data tab.) energy (zJ) 1400 1200 1000 800 600 400 200 0 I B -A Use this diagram to complete the table below. What is the energy of the electron in the ground state? What is the energy of the electron in the first excited state? If the electron makes the transition shown by the red arrow, from A to C, will a photon be absorbed or emitted? Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 significant digits. 250 ZJ 400 ZJ absorbed emitted nm x10 X S

Write the ground-state electron configurations for the following elements: V, As, Au.    V:       As:       Au:

Which quantum designations describes a spherical orbital? 5f 3d O 2s 4p