Choose the answer which lists the atoms Pb, Ga, Ti, Br, and Sn in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell.
a) Ti, Ga, Br, Sn, Pb
b) Pb, Ti, Sn, Ga, Br
c) Br, Sn, Ga, Ti, Pb
d) Sn, Pb, Ti, Ga, Br
e) Ga, Br, Ti, Sn, Pb