2. Which element has an electron configuration of [Ar]4s23d10?
Cd Li Zn Cu
3. What is the ionization energy of He+?
5246 kJ/mol 1212 kJ/mol 4064 kJ/mol 1313 kJ/mol 7241 kJ/mol
4. What is the electron configuration of Nd?
[Xe]6s24f4 [Xe]6s24f3 [Xe]6s26f4 [Xe]5s24d4 None of these
5. What is the maximum number of electrons in an atom with n = 5 and ms= +1/2?
26 25 24 23 22
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