Answer
a) 1s$^{2}$2s$^{2}$2p$^{6}$2s$^{2}$3p$^{5}$
b) Representative
c) Paramagnetic
Work Step by Step
a) Based on the Aufbau principle and that electrons fill up as you move through the different blocks on the periodic table, one can determine that if this element has 17 electrons, the electrons will build up to complete s, p, and then d orbitals in subshells of increasing amounts of energy
b) Since this element ends in the p block, you can determine that it is located with the other representative elements
c) Since this element has only 5 electrons in the 3p orbital, then not all of the electrons are paired together, leaving parallel spins that cause its paramagnetism.
