Chem 161 Ready for class? Electron Configuration and Chemical Periodicity
1. Write electron configuration for …. DO NOT use the core notation. Write out the last one so it would
match the Box diagram. ( for example, write ….2p1,1,0 instead of 2p2).
a) Sn
b) Ba
c)Nb
d) Mg
2. Write electron configuration for …. Use the core notation. Write out the last one so it would match
the Box diagram. ( for example, write ….2p1,1,0 instead of 2p2).
a) Sn
a) Zr
b) Co
c) Kr
d) As
3. How many families are there in d-block?
What is the maximum number of electrons you can fill in 3d?
How many “boxes’ do you draw for 3d?
4d?
4. Write 4 quantum numbers in sequence for
a) the last electron of Al
b) for last electron of Ca
c)the 50th electron of W
5. The maximum number of electrons in
a) n=3
b) 4d
c) One orbital by the name of 3p
d) Shell 4
e) Subshell g
6. Write an chemical equation that goes with…
a) heat of combustion of Mg.
4d?
b) heat of formation of PBr3(s)
c) First ionization energy of Na.
d) second electron affinity of oxygen.
7. What is the trend for …. When you go across the period? Down a family?
For each trend, explain in your own words what it means and/or why it is.
a) atomic size?
b) ionization energy?
c) electron affinity?
8. Which should be larger according to the general trend? List one MAIN reason.
a) Li, Na?
b) K or K+?
c) Cl or Cl-?
d) P or S?