Number of unpaired electrons in sulphur is 

The electronic configuration of sulphur is as :

$\mathrm{S}(\mathrm{Z}=16):1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^4$

Hence, it has two unpaired electrons.