Answer
a) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d${^8}$4s$^{2}$
b) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{4}$
c) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$4s$^{2}$4p$^{3}$
d) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$4s$^{2}$4p$^{6}$5s$^{1}$
Work Step by Step
a) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d${^8}$4s$^{2}$
b) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{4}$
c) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$4s$^{2}$4p$^{3}$
d) 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$4s$^{2}$4p$^{6}$5s$^{1}$
